SAT Sentence Completion Practice Question 184: Answer and Explanation

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Question: 184

12. The new vaccine is ------- preventing certain forms of pneumonia and should, therefore, be more widely ------- in order to prevent outbreaks of the disease.

A. required for . . constrained
B. unsuccessful in . . distributed
C. instrumental in . . reconstituted
D. effective in . . administered
E. unverified for . . disseminated

Correct Answer: D

Explanation:

Explanation for Correct Answer D :

Choice (D) is correct. Something that is "effective" produces a desired effect. "Administered" means dispensed. If one were to insert these terms into the text, the sentence would read "The new vaccine is effective in preventing certain forms of pneumonia and should, therefore, be more widely administered in order to prevent outbreaks of the disease." The word "therefore" indicates that the second part of the sentence should logically occur, based on the claim made in the first part. It makes sense to argue that a successful vaccine should be widely administered.

Explanation for Incorrect Answer A :

Choice (A) is incorrect. "Required" means needed or essential. "Constrained" means to keep within close bounds. If one were to insert these terms into the text, the sentence would read "The new vaccine is required for preventing certain forms of pneumonia and should, therefore, be more widely constrained in order to prevent outbreaks of the disease." It makes no sense to say that a vaccine that is required for preventing illness should be "constrained," or restricted.

Explanation for Incorrect Answer B :

Choice (B) is incorrect. "Unsuccessful" means having an unfavorable outcome. "Distributed" means delivered or handed out. If one were to insert these terms into the text, the sentence would read "The new vaccine is unsuccessful in preventing certain forms of pneumonia and should, therefore, be more widely distributed in order to prevent outbreaks of the disease." It is illogical to argue that an unsuccessful vaccine should be distributed or passed out more widely.

Explanation for Incorrect Answer C :

Choice (C) is incorrect. "Instrumental" means serving as a means or agency. "Reconstituted" means provided with a new structure. If one were to insert these terms into the text, the sentence would read "The new vaccine is instrumental in preventing certain forms of pneumonia and should, therefore, be more widely reconstituted in order to prevent outbreaks of the disease." An instrumental or helpful vaccine does not need to be reconstituted, or remade, because it is already effective.

Explanation for Incorrect Answer E :

Choice (E) is incorrect. "Unverified" means lacking proof or substantiation. "Disseminated" means dispersed throughout. If one were to insert these terms into the text, the sentence would read "The new vaccine is unverified for preventing certain forms of pneumonia and should, therefore, be more widely disseminated in order to prevent outbreaks of the disease." It makes no sense to argue that an unverified or unproven vaccine should be disseminated or dispensed more widely.

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