Question a-harp

3.1 Boundaries - Parenthetical punctuation: commas, dashes, parentheses
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A harpsichord may look just like a piano, but the difference between the two instruments is easy to hear. When a harpsichord’s keys are pressed, the strings inside the blank are plucked, not struck.

Which choice completes the text so that it conforms to the conventions of Standard English?

A.

instrument:

B.

instrument

C.

instrument—

D.

instrument,

A harpsichord may look just like a piano, but the difference between the two instruments is

Medium-difficulty · SAT Reading & Writing · Boundaries — Parenthetical punctuation: commas, dashes, parentheses. Read the question above, select your answer, and check the full explanation below to understand exactly why the correct choice works.

Answer explanation

Choice B is the best answer. The convention being tested is punctuation use between a subject and a verb. When, as in this case, a subject ("the strings inside the instrument") is immediately followed by a main verb ("are plucked"), no punctuation is needed.

Choice A is incorrect because no punctuation is needed between the subject and the verb. Choice C is incorrect because no punctuation is needed between the subject and the verb. Choice D is incorrect because no punctuation is needed between the subject and the verb.