PSAT Reading Question 607: Answer and Explanation

Question: 607

The author suggests that as physics has advanced, its theories are often

• A. practically applicable.
• B. ethically offensive.
• C. historically consistent.
• D. more counterintuitive.

Correct Answer: D

Explanation:

(D) In lines 61–65, the author describes string theory, stating that the vibrations of "tiny strings" have led physicists to postulate about the nature of "multiple universes." That something tiny can lead to a hypothesis about something massive is quite paradoxical, as suggested by choice (D)—the correct answer. The author makes no mention of practical applicability, just as he makes no mention of ethics. Choice (C), "historically consistent," is the opposite of what the author is saying.