Hi, there. I'm happy to help with this one.
This is OG13 SC #4, a new question that does not appear in OG12 .
The BIG IDEA of this question is the " not only .... but also " idiom. The "not only" phrase appears in all five answer choices, and on the GMAT, every "not only" has to be followed by a "but only."
Right away, that eliminates (A) & (D) & (E), leaving only (B) and (C).
Now we have to look at parallelism, because in the construction "not only X but also Y", X and Y must be in parallel.
In (B) we have
= could not only arrange music
= but also mirror
verb "arrange" correctly parallel with verb "mirror"
In (C) we have
= not only could arrange music
= but also to mirror
One is a verb and the other is an infinitive, so this is a failure of parallelism. Also, notice the common word "could" either needs to be totally outside ---- "could not only X but also Y" --- or it need to appear in both terms ---- "not only could X but also could Y".
For a variety of reasons, (C) is incorrect, so we are left with (B) as the best answer.