The answer choice "include family history, poor diet, and excessive stress" is correct because it contains appropriate parallelism—in this case, a list of three noun phrases.

The original text "include family history, poor diet, and having an excess of stress" and the answer choice "include family history, poor diet, and having an excessive amount of stress" contain faulty parallelism—the last item in the list includes the verb "having" whereas the first two items in the list do not employ verbs. These answers are therefore incorrect.

Answer choices "includes family history, poor diet, and excessive stress" and "tends to include family history, poor diet, and excessive stress" are incorrect because they both use singular predicates for the plural subject, "risk factors for cardiovascular disease."

The sentence must have proper parallel structure, which means that all of the items listed must be the same type of word. The first two words in the list are verbs ("froze" and "turned pale"), so the last item in the list should also begin with a verb. So, the pronoun "she" should be removed so that "couldn't say," a past tense verb, matches the other items in the list. The simplest and most concise wording is correct.

The pairing of the two phrases indicate that they need to have a parrallel tense for each verb. Only two answer choices, "to play with toys and to run in parks," and "playing with toys, running in parks," are parrallel, and "playing with toys, running in parks," should be separated by a conjunction.

The term, if not more effective, is an interrupter; therefore, the sentence should read correctly if those words are removed.

This sentence's error is one of parallel structure. The first two items in its list, "Public education" and "health care," are nouns, but the third item, "the constructing of new roadways," begins with a gerund. All of the items in a list should be formatted in the same way. There are numerous ways in which we could change the sentence so that each of its items take on the same grammatical form, and several answer choices correctly fix this issue; only "Public education, health care, and constructing new roadways are all areas," which changes the gerund "constructing" to a present progressive verb by omitting the definite article "the," does not do this.

All but one of the answer choices that fix the parallel structure of the list introduce new errors. "Public education, health care, and new roadway construction is all areas" incorrectly uses the singular verb "is" to refer to the plural compound subject, so it is incorrect. "All areas are public education, health care, and new roadway construction" convolutes the sentence's word order and makes it confusing by making it seem as if "all areas"—all of the areas in total, not just the ones "that we desperately need to fund"—are the three listed. Only "Public education, health care, and new roadway construction are all areas" fixes the sentence's error without introducing new mistakes, making it the correct answer and the corrected sentence "Public education, health care, and new roadway construction are all areas that we desperately need to fund."

The original text contains a faulty comparison. It compares the price of soybeans to corn itself, rather than comparing the price of soybeans to the price of corn.

Only answer choices "is currently greater than the price of corn" and "has been currently greater than the price of corn" draw the comparison correctly, but answer chioice "has been currently greater than the price of corn" contains a tense error. Since the sentence includes the word "currently," we know we should use present tense. Therefore, answer choice "is currently greater than the price of corn" is correct.

The last phrase of the sentence is confusing, as it is unclear exactly who is becoming "a truly great artist." The sentence is best served by making it clear who can become the "truly great artist." The answer choice that best fixes the issue is "Artistic ability is an inborn skill, but always needs to be developed for someone to become a truly great artist."

Logically, the rejection of art would be disturbing to pundits (a noun defined as learned individuals) and laymen. Using this knowledge, students could eliminate any answer choice that would say that this would not be disturbing. Even without this knowledge, based on the rule of concordance, students would know that the only plausible options are "both pundits and laymen" or "neither pundits nor laymen," because "neither" always goes with "nor" and "either" always goes with "or." So, the correct answer is "both pundits and laymen."

The original text contains a faulty compaison. It compares portraits painted during the Renaissance to the time period of the Middle Ages. Instead, portraits should be compared to other portraits. The only answer choice that correcly makes this comparison is "reveal a stricter adherence to the principles of realism than those painted during the Middle Ages."

In any "neither . . . nor" phrase, each item being compared has to be the same kind of item so a proper comparison can be made. The sentence is written with two different elements, the simple noun "antibiotics" and the verbal phrase "the use of disinfectants." The only answer choice that uses an appropriate parallel structure, by redeploying the verbal phrase to cover both items, is "Neither the use of antibiotics nor disinfectants helped slow."