A high school student fanatically devoted to modern art, Fanny has toured five museums, perhaps most remarkably the enormous Museum of Modern Art.
(A) Fanny has toured five museums, perhaps most remarkably the enormous Museum of Modern Art
(B) perhaps the most remarkable of the five museums toured by Fanny was the enormous Museum of Modern Art
(C) of the five museums toured by Fanny, perhaps the most remarkable was the enormous Museum of Modern Art
(D) five museums were toured by Fanny, of which the enormous Museum of Modern Art is perhaps the most remarkable
(E) the enormous Museum of Modern Art is perhaps the most remarkable of the five museums toured by Fanny

"A high school student fanatically devoted to modern art," is a modifying phrase which is correctly modifying "Fanny" in A

Rest all have modifier issues
_________________

MANHATTAN REVIEW OFFICIAL EXPLANATION:

This is a very simple question of a dangling modifier. Who is the student devoted to modern art? Fanny. Therefore, the part of the sentence after the first comma must begin with the word Fanny, who happens to do something. The only choice that does that is A, the correct answer.
_________________