Adult Literacy Advanced Quiz: Synthesizing Sources
10 questions · exam conditions
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Synthesizing SourcesQuestion 1 of 10

Source 1: Emergency Management Review

City records indicate that 92 percent of registered mobile devices received the evacuation alert during the May chemical spill. Alerts were issued in English, Spanish, and Vietnamese according to each user's saved language preference. Officials concluded that the distribution system reached most registered devices.

Source 2: Community Organization Interviews

Spanish-speaking residents interviewed after the spill generally recalled receiving an alert, but several misunderstood whether they should leave immediately or remain indoors. Interviewers observed that the Spanish message used a technically accurate term for "shelter in place" that was unfamiliar to some residents. People with older phones also reported that the message was cut off after several lines.

Which explanation most coherently accounts for the findings in both sources?

The city's delivery records are unreliable because residents who misunderstood an alert should be counted as having never received one.
Although the system delivered alerts to most registered devices, unfamiliar wording and truncated messages sometimes prevented delivery from producing clear understanding.
The multilingual system failed mainly because users had selected incorrect language preferences before the spill occurred.
Because the translation was technically accurate, confusion must have resulted from residents disregarding instructions that appeared on their phones.
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Adult Literacy Advanced Quiz

Adult Literacy Advanced Quiz: Synthesizing Sources

Practice Synthesizing Sources in Adult Literacy Advanced with focused quiz questions that help you check what you know, review explanations, and build confidence with test-style prompts.

What this quiz covers

This quiz focuses on Synthesizing Sources, giving you a quick way to practice the rules, question types, and explanations that matter most for Adult Literacy Advanced.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

All questions

Question 1

Source 1: Emergency Management Review

City records indicate that 92 percent of registered mobile devices received the evacuation alert during the May chemical spill. Alerts were issued in English, Spanish, and Vietnamese according to each user's saved language preference. Officials concluded that the distribution system reached most registered devices.

Source 2: Community Organization Interviews

Spanish-speaking residents interviewed after the spill generally recalled receiving an alert, but several misunderstood whether they should leave immediately or remain indoors. Interviewers observed that the Spanish message used a technically accurate term for "shelter in place" that was unfamiliar to some residents. People with older phones also reported that the message was cut off after several lines.

Which explanation most coherently accounts for the findings in both sources?

  1. The city's delivery records are unreliable because residents who misunderstood an alert should be counted as having never received one.
  2. Although the system delivered alerts to most registered devices, unfamiliar wording and truncated messages sometimes prevented delivery from producing clear understanding. (correct answer)
  3. The multilingual system failed mainly because users had selected incorrect language preferences before the spill occurred.
  4. Because the translation was technically accurate, confusion must have resulted from residents disregarding instructions that appeared on their phones.
Explanation: When a question asks you to reconcile findings from two different sources, your job is to find the explanation that honors both without distorting either one. Think of it as building a bridge — the right answer must touch both banks. Here, Source 1 shows strong delivery numbers (92% of registered devices received the alert), while Source 2 reveals that some recipients were confused by unfamiliar wording or received cut-off messages. The best explanation doesn't contradict either source — it shows how both can be true simultaneously. Answer B does exactly this: the system successfully delivered alerts to most devices, but delivery alone didn't guarantee comprehension, because some wording was technically accurate yet unfamiliar, and older phones truncated the message. Delivery and understanding are two distinct outcomes, and B correctly separates them. Answer A fails because it redefines "received" to mean "fully understood" — that's not what the records measure, and collapsing those two concepts contradicts Source 1's methodology without any evidence that the records are flawed. Answer C introduces a claim — that users selected wrong language preferences — that neither source supports; in fact, Source 2 indicates Spanish speakers did receive Spanish-language alerts. Answer D dismisses the confusion by blaming residents for ignoring instructions, but Source 2 specifically identifies unfamiliarity with wording as the cause — not indifference. Assuming residents were careless directly contradicts the evidence. When synthesizing multiple sources, always ask: Does this answer require me to ignore or reinterpret evidence from either source? If yes, eliminate it. The correct answer will acknowledge complexity rather than erase it.

Question 2

Source 1: Redevelopment Authority History

In the 1970s, the city replaced the Riverside Market district with a convention center. Official reports described many market buildings as unsafe and emphasized the construction jobs the project would create. Property records show that owners received compensation, but most produce vendors leased their stalls and were therefore not eligible for those payments.

Source 2: Oral-History Collection

Former vendors recalled that the market provided inexpensive space where newly arrived families could start small businesses. Several interviewees agreed that the buildings needed repairs, yet they said relocation scattered customers and neighboring merchants. Because the interviews were recorded decades later, individual details sometimes conflict.

Which historical account most effectively synthesizes the two sources?

  1. The redevelopment addressed documented building problems and promised jobs, but it also disrupted a commercial network whose tenant vendors generally did not receive property compensation. (correct answer)
  2. The convention center was built only to remove immigrant-owned businesses, as proven by consistent oral accounts that all market buildings were structurally sound.
  3. Since property owners received compensation, the redevelopment caused little economic disruption to vendors, customers, or nearby merchants.
  4. Conflicting details in later interviews make the oral histories unusable, so the official reports provide the only credible account of the market's removal.
Explanation: When a question asks you to synthesize two sources, your job is to find the answer that honestly represents what both sources contribute — including their tensions and gaps — without overstating or dismissing either one. Answer A does exactly this. The official records confirm that buildings had documented problems and that construction jobs were promised — real, verifiable points. The oral histories add that vendor networks were disrupted and that tenant vendors, unlike property owners, received no compensation. A holds both truths together without exaggerating or ignoring either source, making it the strongest synthesis. Answer B fails on two counts. First, the oral histories never claim all buildings were structurally sound — interviewees actually acknowledged repairs were needed. Second, describing the demolition as proven immigrant targeting contradicts the standard of evidence both sources actually provide. B replaces careful synthesis with an unsupported accusation. Answer C misreads what compensation means in context. Because most vendors were tenants, not owners, property payments did not reach them. Concluding that compensation meant little disruption ignores the very distinction Source 1 itself draws — and completely sidelines Source 2's account of scattered customers and merchants. Answer D commits a common critical-reading error: treating minor inconsistencies in oral histories as total disqualification. Source 2 explicitly notes that individual details sometimes conflict, but that doesn't make the broader pattern of testimony worthless. Good historical reasoning weighs imperfect evidence rather than discarding it. Your takeaway: when synthesizing sources, look for an answer that integrates both without exaggerating claims either source actually makes. If an answer uses words like "only," "proven," or "little disruption," treat that as a red flag.

Question 3

Source 1: Municipal Food-Waste Audit

A weeklong audit of four city-owned cafeterias found that food discarded during preparation accounted for 46 percent of their waste. Uneaten food returned on customers' trays accounted for 34 percent, while unserved prepared meals accounted for 20 percent. Auditors recommended improving ingredient storage and tracking which menu items are frequently left uneaten.

Source 2: Cafeteria Managers' Memo

Managers support donating safe, unserved meals to local shelters. They note, however, that donation requires refrigeration, recordkeeping, and staff time. They also report that cooks sometimes prepare excess meals because daily attendance is difficult to predict.

Which proposal best synthesizes the evidence from both sources?

  1. Require donation of all cafeteria waste because unserved meals constitute the largest category and shelters already possess the staff needed to manage it.
  2. Focus only on customer education because uneaten tray food represents the majority of waste that cafeteria employees can realistically prevent.
  3. Improve storage and menu tracking, refine attendance estimates, and establish a donation process where staffing and refrigeration make it practical. (correct answer)
  4. Reduce meal preparation by 46 percent, then donate any remaining ingredients to shelters rather than investing in additional waste tracking.
Explanation: When a question asks you to "synthesize evidence from both sources," it's testing whether you can build a proposal that honors all the key findings — not just cherry-pick one statistic or one source. A strong synthesis addresses every major problem identified across both documents. Both sources together reveal three distinct issues: waste during food preparation (46%), uneaten tray food (34%), and unserved prepared meals (20%). Source 1's auditors recommend better storage and menu tracking. Source 2's managers flag that over-preparation happens because attendance is unpredictable, and that donation — while desirable — requires refrigeration, recordkeeping, and staff. Answer C addresses all of this: improving storage and tracking (Source 1's recommendation), refining attendance estimates to reduce over-preparation (Source 2's root cause), and creating a donation system only where resources allow (Source 2's practical constraints). That's a true synthesis. Answer A fails because it misreads the data — unserved meals are actually the smallest category at 20%, not the largest. It also ignores the managers' warning that shelters don't automatically have the capacity to absorb donations. Answer B is too narrow; focusing only on customer education targets tray waste (34%) while ignoring the largest category, preparation waste (46%), and dismisses the managers' concerns entirely. Answer D invents a figure — cutting preparation by exactly 46% — that doesn't come from either source, and redirecting ingredients to shelters sidesteps the operational challenges managers explicitly raised. Your strategy tip: on synthesis questions, treat each source like a checklist. Before choosing an answer, ask yourself, "Does this proposal account for the findings and the constraints from every source?" If it ignores even one, it's probably a distractor.

Question 4

Source 1: Transit Department Brief

During the six months after Riverton added evening bus service and increased weekend frequency, average weekend ridership rose by 18 percent. Evening ridership rose by 11 percent. The department cautioned that gasoline prices also increased during this period and that several downtown festivals may have affected weekend travel.

Source 2: Rider Survey Summary

In a survey completed by 620 bus riders, 54 percent of respondents who had recently begun riding on weekends identified shorter waits as an important reason. Thirty-one percent mentioned the cost of driving. Because the survey was distributed on buses, it did not include residents who considered using transit but decided against it.

Which paragraph most effectively synthesizes the two sources into an accurate explanation of the ridership increase?

  1. Weekend and evening ridership increased entirely because more frequent service shortened waiting times, as confirmed by most riders in the transit department's survey.
  2. Expanded service likely contributed to increased ridership, particularly by reducing weekend waits, although higher gasoline prices and special events may also have influenced the change. (correct answer)
  3. Higher gasoline prices were probably the main cause of increased ridership because nearly one-third of surveyed riders identified driving costs as a consideration.
  4. The survey proves that most Riverton residents prefer buses to driving, but its findings do not explain why evening ridership increased less than weekend ridership.
Explanation: When a question asks you to synthesize multiple sources, your job is to combine their information fairly — representing what each source actually says without overstating, understating, or cherry-picking. Strong synthesis acknowledges both evidence and its limitations. Answer B does this well. Source 1 shows ridership rose after service expanded, but explicitly flags confounding factors — gas prices and downtown festivals. Source 2 shows that many new weekend riders valued shorter waits, supporting a connection between expanded service and ridership. B accurately reflects both the likely contribution of expanded service and the genuine uncertainty introduced by those other variables. It's cautious ("likely contributed") without dismissing the evidence. Answer A fails because it says ridership increased "entirely" due to service frequency — an absolute claim neither source supports. It also wrongly attributes the survey to the transit department. Overstating certainty is a classic synthesis error. Answer C misreads the survey data. Thirty-one percent mentioning driving costs doesn't make gas prices the "main cause" — that's a minority response, and correlation in timing doesn't establish it as the primary driver. This choice elevates one detail while ignoring stronger evidence. Answer D makes two errors: the survey reached only current riders, so it cannot tell us what "most Riverton residents" prefer, and explaining the gap between evening and weekend ridership percentages isn't the question either source was designed to answer. A useful strategy: when synthesizing sources, ask yourself whether your answer reflects both sources proportionally and whether it respects the uncertainty each source signals. If an answer sounds too definitive, it's usually wrong.

Question 5

Source 1: Library Circulation Report

One year after West County Library eliminated overdue fines, the number of long-overdue items returned increased by 22 percent. The number of active cardholders also increased, particularly in branches serving lower-income neighborhoods. During the same year, the library extended Saturday hours and introduced online card registration.

Source 2: Patron Interviews

Several returning patrons said that old fine balances had made them reluctant to visit the library. Others reported that online registration or longer weekend hours brought them back. The interviews were voluntary and were not designed to represent all library users.

Which conclusion best synthesizes the evidence about why library use increased?

  1. Removing fines appears to have reduced a barrier for some patrons, but longer hours and online registration may also have contributed to increased participation. (correct answer)
  2. The 22 percent increase in returned items proves that eliminating fines was solely responsible for the rise in active cardholders across every branch.
  3. Longer Saturday hours caused most former patrons to return, since voluntary interviews provide more dependable evidence than circulation records.
  4. The policy changes had little effect because the interviews did not represent all users and therefore invalidate the library's recorded increases.
Explanation: When a question asks you to synthesize evidence from multiple sources, your job is to find the conclusion that fairly represents all the information without overstating what any single source proves. Watch for answer choices that ignore one source entirely, make absolute claims the data can't support, or dismiss valid evidence on a technicality. Answer A is correct because it accurately reflects both sources without overreaching. The circulation report shows increased returns and new cardholders alongside multiple policy changes — fine elimination, extended hours, and online registration. The patron interviews confirm that fines were a barrier for some people, while others credited different changes. A threads this together honestly: fines "appear" to have helped, but other factors "may also have contributed." That careful, hedged language matches the actual strength of the evidence. Answer B fails because it uses the word "solely" and "proves" — neither of which the data supports. The circulation report cannot isolate fine elimination from the other simultaneous changes, so claiming it was the only cause is a logical leap the evidence doesn't justify. Answer C gets the evidence hierarchy backwards. Voluntary, self-selected interviews are actually less reliable for drawing broad conclusions than systematic circulation records. Elevating interview responses above recorded data — and then naming a single cause — misreads both sources. Answer D commits the opposite error: it uses the interviews' limitations to dismiss the entire body of evidence, including the library's documented circulation increases. Imperfect evidence still counts; it just requires careful interpretation. Your strategy: when synthesizing sources, the best conclusion acknowledges multiple factors and matches its certainty to the strength of the evidence — not stronger, not weaker.

Question 6

Source 1: Household Water Testing Notice

In several older homes, water collected immediately after faucets had been unused overnight contained lead above the recommended action level. Samples taken after the water ran for three minutes were below that level in most, but not all, of those homes. The notice advised residents to use flushed cold water for drinking and cooking while further investigation continued.

Source 2: Utility Infrastructure Report

The utility confirmed that many homes in the affected area are connected to water mains by lead service lines. Replacing those lines would reduce a major source of exposure, but full replacement is expected to take five years. Corrosion-control treatment is being adjusted in the meantime.

Which public explanation best combines the testing and infrastructure information?

  1. Lead exposure is limited to hot water because flushing cold faucets removed all detectable lead from every home included in the investigation.
  2. Corrosion treatment makes service-line replacement unnecessary, although residents should continue flushing solely to lower their monthly water use.
  3. Because most flushed samples were below the action level, the lead service lines are unrelated to the elevated overnight samples.
  4. Water standing in lead-containing plumbing can create higher exposure after inactivity; flushing is an interim precaution, while treatment and line replacement address the underlying risk. (correct answer)
Explanation: When a question asks you to combine information from two sources, your job is to find the answer that accurately reflects both passages without distorting or ignoring either one. Watch for answer choices that misrepresent what the sources actually say — especially ones that overstate certainty or draw false connections. Answer D does exactly what the question requires. Source 1 establishes that water sitting in pipes overnight showed elevated lead, while flushing reduced — but didn't always eliminate — the problem. Source 2 explains why: lead service lines are a structural source of contamination, with replacement and corrosion treatment as long-term solutions. D accurately threads these together: standing water in lead plumbing raises exposure risk, flushing is a short-term protective measure, and the real fixes are treatment and infrastructure replacement. A is factually wrong on two counts: it claims flushing removed all lead from every home (Source 1 says "most, but not all"), and it limits exposure to hot water, which neither source mentions. B misrepresents the relationship between corrosion treatment and line replacement — Source 2 says treatment is an interim measure while replacement proceeds, not a substitute for it. The claim about flushing reducing water bills is simply invented. C draws a false conclusion. Finding that most flushed samples were acceptable doesn't mean the service lines are unrelated — the infrastructure report directly confirms lead lines are a major exposure source. This choice confuses a partial result with a complete explanation. Your strategy: when combining two sources, check that your chosen answer is consistent with both — any choice that contradicts or ignores either source is a distractor.

Question 7

Source 1: Four-Day Workweek Evaluation

A benefits office tested four ten-hour workdays for six months. Employees processed approximately the same number of cases per week, and unscheduled absences declined. The evaluation counted completed cases but did not measure whether clients had to wait longer for assistance.

Source 2: Client Services Log

During the pilot, Friday telephone complaints increased, especially from clients who could not contact their assigned caseworker. On Mondays, call volume was unusually high. A neighboring office using staggered employee days off maintained five-day telephone coverage without increasing total staff hours.

Which revision to the pilot is best supported by a synthesis of the two sources?

  1. Return every employee to five eight-hour days because stable case totals show that the longer workdays produced no benefit for staff or clients.
  2. Retain compressed schedules but stagger employees' days off so that reduced absences can be preserved while weekday client coverage improves. (correct answer)
  3. Close telephone service on Mondays as well as Fridays because concentrated call volume indicates that clients prefer fewer opportunities to contact staff.
  4. Make the Friday closure permanent because completed-case totals are a sufficient measure of service quality despite the rise in telephone complaints.
Explanation: When a question asks you to synthesize two sources, your job is to find a solution that honors the evidence from both — not just one. Think of it as a problem where each source reveals one piece of the puzzle, and the best answer fits them together. Source 1 shows that the compressed schedule produced a genuine benefit: fewer unscheduled absences and steady productivity. Source 2 reveals a real cost: clients struggled to reach staff on Fridays, and Mondays became overwhelmed with spillover calls. Crucially, Source 2 also points toward a specific fix — a neighboring office solved this exact problem by staggering days off without adding staff hours. B directly reflects this synthesis. It preserves the absence reduction (the benefit from Source 1) while addressing the coverage gap (the problem from Source 2), using the very model Source 2 describes as effective. A fails because it dismisses the pilot entirely, ignoring that the absence reduction was a meaningful benefit. Recommending a full reversal based only on "stable case totals" misreads Source 1's limited scope and throws away real gains. C inverts the logic of the complaint data — high Monday call volume reflects pent-up demand from Friday closures, meaning clients want more access, not less. Closing Mondays would deepen the problem, not solve it. D commits the most dangerous error: it treats completed-case counts as a complete measure of service quality while explicitly ignoring the telephone complaint data, which is exactly what Source 1's evaluation admitted it failed to capture. Your strategy tip: when synthesizing sources, eliminate any answer that draws only from one source or contradicts evidence in the other. The best synthesis answer respects all the data.

Question 8

Source 1: Flexible-Scheduling Pilot Report

During a three-month flexible-scheduling pilot at a claims-processing office, the number of claims completed per employee remained approximately unchanged. Error rates also remained stable overall. However, supervisors reported that recently hired employees made more errors when experienced staff members worked different hours and were unavailable for immediate questions.

Source 2: Employee Survey

Most employees favored continuing flexible schedules. Caregivers especially valued being able to plan work around family obligations. Employees assigned to telephone support were less enthusiastic, explaining that frequent schedule changes made it difficult to ensure adequate coverage during peak calling periods.

Which recommendation is most strongly supported by a synthesis of the two sources?

  1. Continue flexible scheduling, but coordinate mentor availability for new employees and establish minimum coverage periods for telephone support. (correct answer)
  2. End flexible scheduling because stable overall productivity concealed higher error rates among every group except experienced claims processors.
  3. Expand flexible scheduling without restrictions because employee approval demonstrates that productivity and customer access will continue unchanged.
  4. Reserve flexible scheduling for new employees and telephone staff because those groups experienced the clearest operational benefits during the pilot.
Explanation: When a question asks you to synthesize multiple sources, your job is to find a recommendation that honestly accounts for all the evidence — the successes, the problems, and the nuances — not just the parts that support one conclusion. Both sources together tell a layered story: flexible scheduling generally preserved productivity, and most employees valued it. But two specific groups experienced real problems — new employees made more errors without experienced mentors nearby, and telephone support staff struggled to maintain coverage. A strong synthesis acknowledges the overall positive findings and these targeted concerns, then recommends a solution that addresses both. Answer A does exactly that. It keeps flexible scheduling (honoring the broadly stable productivity and strong employee approval) while adding two targeted fixes: coordinating mentor availability for new hires and establishing minimum coverage windows for phone staff. That's a precise, evidence-based response to every significant finding across both sources. Answer B is wrong because it overstates the data. The pilot showed stable overall error rates — errors increased only among new employees, not every group. Citing hidden universal error spikes misrepresents Source 1. Answer C is wrong because it ignores the documented problems entirely. Employee approval alone doesn't prove uninterrupted productivity or customer access — Source 1 and Source 2 both identify specific gaps that an unrestricted expansion would leave unresolved. Answer D reverses the evidence. New employees and telephone staff experienced challenges, not benefits, under flexible scheduling. Reserving flexibility for them contradicts what both sources actually report. Your strategy tip: when synthesizing sources, eliminate any answer that cherry-picks only positive or only negative evidence. The right synthesis recommendation addresses what worked and what needs fixing.

Question 9

Source 1: Urban Climate Study

Researchers measured afternoon temperatures on twelve residential blocks. Blocks with mature tree canopy averaged cooler surface temperatures than blocks with little shade. Because the study was observational, researchers noted that building density, pavement coverage, and other neighborhood differences could have contributed to the temperature pattern.

Source 2: Parks Department Assessment

The department found that newly planted street trees require several years to provide substantial shade. Survival rates are highest when watering and maintenance are funded for at least three summers. In earlier planting campaigns, many trees died where maintenance responsibility was unclear.

Which statement best integrates the sources without overstating what they establish?

  1. Planting trees will immediately reduce every neighborhood's temperature because the climate study isolated tree canopy from pavement and building density.
  2. Tree planting cannot reduce urban heat until researchers prove that shade is the only factor distinguishing cooler blocks from warmer ones.
  3. Because mature trees correlate with cooler surfaces, the city should replace heat-reduction programs with planting campaigns that require no long-term funding.
  4. Expanding tree canopy may support long-term heat reduction, but results will depend on sustained maintenance and on other neighborhood conditions that affect temperature. (correct answer)
Explanation: When a question asks you to integrate multiple sources, your job is to find the statement that accurately reflects what both sources say — without adding claims they don't support or dismissing findings they do support. Source 1 shows a correlation between mature tree canopy and cooler surfaces, but explicitly notes that other factors (building density, pavement) could explain the pattern. Source 2 establishes that young trees need years and sustained funding to provide meaningful shade. Together, these sources support cautious optimism about tree planting — not certainty, and not dismissal. Answer D captures this perfectly. It acknowledges that expanding tree canopy may support long-term heat reduction (honoring the correlation in Source 1 without overclaiming causation), while flagging that success depends on maintenance funding (Source 2) and other neighborhood variables (Source 1). This is precise, evidence-grounded integration. Answer A fails because Source 1 explicitly did not isolate tree canopy from other variables — that's the opposite of what the researchers said. Claiming "immediate" results also contradicts Source 2's timeline. Answer B goes too far in the other direction: demanding proof that shade is the only factor before acting sets an impossible standard the sources never suggest. Correlation can still inform policy without proving sole causation. Answer C misreads both sources by suggesting tree planting should replace other programs and needs no long-term funding — directly contradicting Source 2's warning about maintenance. Strategy tip: When integrating sources, watch for answer choices that ignore a source's stated limitations or flip those limitations into absolute barriers. The best answer respects what the evidence does and doesn't establish.

Question 10

Source 1: Workforce Agency Report

Participants who completed the regional manufacturing apprenticeship earned a median of 14 percent more one year later than they had earned before enrolling. However, 38 percent of those who entered the program did not complete it. The report did not compare participants with similar workers who chose not to enroll.

Source 2: Employer Advisory Letter

Employers praised completers' technical preparation but noted that applicants who finish the program may already be unusually persistent. Employers also reported that some apprentices left before completion after discovering that available jobs required rotating night shifts.

Which assessment best synthesizes the sources' evidence about the apprenticeship?

  1. The apprenticeship guarantees higher wages because all participants who faced rotating shifts remained long enough to gain advanced technical skills.
  2. The program has no demonstrated value because its noncompletion rate prevents employers from evaluating the preparation of successful apprentices.
  3. Completers experienced wage gains and employers valued their preparation, but selection differences and substantial noncompletion limit claims that the program alone produced those gains. (correct answer)
  4. Persistent applicants should be excluded from future cohorts so the agency can determine whether rotating shifts are the sole cause of noncompletion.
Explanation: When a question asks you to synthesize multiple sources, your job is to combine what each source actually says — including its limitations — into one accurate, balanced conclusion. Watch out for answers that overstate certainty or ignore the evidence's weaknesses. The sources together tell a nuanced story. Source 1 shows completers earned 14% more afterward, but it flags two problems: a 38% noncompletion rate and no comparison group of similar workers who didn't enroll. Source 2 adds that employers valued completers' technical skills, but raises a critical point — people who finish may already be unusually persistent, meaning the program might be selecting high-performers rather than creating them. Together, these pieces support a conclusion that acknowledges both the positive findings and the reasons we can't give the program full credit. That's exactly what C does: it confirms the wage gains and employer approval while honestly noting that selection bias and high noncompletion limit how strongly we can credit the program itself. A is wrong because it claims a guarantee of higher wages and states that all shift-affected participants stayed — neither source supports either claim. B goes too far in the opposite direction, calling the program valueless; employers did evaluate completers and found their preparation strong. D misreads both sources entirely, suggesting we exclude persistent applicants as an experiment — nothing in either source recommends this, and it contradicts the goal of improving outcomes. Your takeaway: when synthesizing sources, the right answer almost never ignores limitations. If an option sounds too certain — or too dismissive — in either direction, treat that as a red flag.