PSAT Writing and Language Question 527: Answer and Explanation

Question: 527

• A. NO CHANGE
• B. Moreover as both San Andreas, and Juan de Fuca are coastal subsequent
• C. Moreover as both San Andreas and Juan de Fuca are coastal subsequent
• D. Moreover—as both San Andreas and Juan de Fuca are coastal subsequent

Correct Answer: A

Explanation:

(A) The principal matter that separates the correct answer from all three incorrect choices is the issue of comma placement between "coastal" and "subsequent." The independent, main clause of the sentence is "subsequent tidal waves would accompany the earthquakes." The clause "as both San Andreas and Juan de Fuca are coastal," is separate and dependent. (It depends on the second clause to constitute a full sentence.) Since the two are separate clauses, the comma must be placed between them for separation.