Sentence Correction (SC) | Re: Unlike the virginal, whose single set

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
(B) with a single set of strings running parallel to the front edge of the instrument,