Unlike the virginal,whose single set of strings runs parallel to the front edge of the instrument, the harpsichord’s several sets of strings are placed at right angles to its front edge.
A) whose single set of strings runs parallel to the front edge of the instrument, the harpsichord’s several sets of strings are
A is wrong for two reasons. People are who and things are that or which, so the use of "whose" when referring to the virginal is incorrect. Also, in this case, the prepositional phrase is the subject of the sentence, "single set" its modifier. Thus the verb "run" must be plural instead of singular.
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A) whose single set of strings runs parallel to the front edge of the instrument, the harpsichord’s several sets of strings are
A is wrong for two reasons. People are who and things are that or which, so the use of "whose" when referring to the virginal is incorrect. Also, in this case, the prepositional phrase is the subject of the sentence, "single set" its modifier. Thus the verb "run" must be plural instead of singular.
...
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