PSAT Writing and Language Question 636: Answer and Explanation

Question: 636

• A. NO CHANGE
• B. it does
• C. one do
• D. OMIT the underlined portion

Correct Answer: B

Explanation:

(B) The "it" refers to the act of involving humans in exploration, which is singular. "Does" is the correct form of the verb "to do" when coupled with a singular subject. Choice (D) could potentially work if instead of "that," the sentence used "the" immediately before the underlined phrase and if instead of "increase," it used "increased" immediately following the underlined phrase.