The sentence is faulty because it uses a pronoun with an ambiguous antecedent. The reader can't be sure who either "they" or "them" is referring to -- the bankers or the computers. The error can be fixed by rearranging the sentence so that "they" is followed by the clarifying subject "bankers."

Whenever you have multiple antecedents in a sentence, you must be extremely clear with pronoun usage in order to avoid any ambiguity. In the sentence above, "it" could refer to either "the drill" or "the trunk." The best way to correct the underlined portion of the sentence above is: "I insist that you take the drill out of the trunk so that the drill can be fixed promptly."

Sentence with multiple antecedents must be extremely clear in their pronoun usage in order to avoid any ambiguity. In the sentence above, "he" could refer to either "George" or "Wilfred." The best way to correct the underlined portion of the sentence above is: "but Wilfred is definitely stronger."

Answer choices "researchers have discovered several additional drugs that, when administered by a health care professional, has helped to reduce the risk of influenza" and "researchers have discovered several additional drugs that, when administered by a health care professional, helps in reducing the risk of influenza" contain subject-verb agreement errors because they use singular verbs—"helps" and "has helped"—rather than the plural verbs required by the plural noun "drugs."

The answer choices containing "they" as opposed to "researchers" are incorrect because they contain an ambiguous pronoun. We don't know to whom "they" refers.

The answer choice "researchers have discovered several additional drugs that, when administered by a health care professional, help to reduce the risk of influenza" is correct because it is the only answer choice that correctly avoids using an ambiguous pronoun and doesn't introduce any subject-verb agreement errors.

Whenever you have multiple antecedents in a sentence, you must be extremely clear with pronoun usage in order to avoid any ambiguity. In the sentence above, "it" could refer to either "the pencil" or "the notebook." The best way to correct the underlined portion of the sentence above is, "Please take the pencil and the notebook off of my desk, then put the pencil in your backpack."

In the sentence above, the antecedent of the pronoun "them" is unclear. It does not make sense to eat a Burger Shoppe restaurant. Clearly what the author of the sentence is trying to indicate is that they need to eat some food, probably from Burger Shoppe. In order to clear up the ambiguity, you must use a noun instead of a pronoun. The best way to correct the underlined portion of the sentence above is: "but we wanted to try to eat Burger Shoppe's food anyway."

The sentence has a vague pronoun reference. The use of "their" before "prescriptions" is ambiguous because we do not know if "their" refers to the doctors' or the pharmacists' prescriptions. The sentence needs to clarify to whom the pronoun refers, so the best answer choice is the one that does this, "and many pharmacists regularly complain about doctors' prescriptions."

Whenever you have multiple antecedents in a sentence, you must be extremely clear with pronoun usage in order to avoid any ambiguity. In the sentence above, "them" could refer to either "pork chops" or "steaks." The best way to correct the underlined portion of the sentence above is, "I love pork chops and I love steaks, but I prefer to eat pork chops whenever I have a choice between the two."

This is an example of an ambiguous pronoun. The "him" in "to give him away" in the original sentence could be applying to either the dog or the cat, so we must make clear that it is one or the other.

In the sentence above, the antecedent of the pronoun "him" is unclear. "Him" cannot refer to a computer, as computers are genderless (for now). Clearly what the author of the sentence is trying to indicate is that the principal had to email "William's father," but William's father never responded. In order to clear up the ambiguity, you must clarify the antecedent. The best way to correct the underlined portion of the sentence above is: "The principal emailed William's father to let him know his son was missing from school again."