The Coast Guard recently redesigned channel markers in the Chesapeake Bay to accommodate large numbers of ospreys, whose huge nests formerly obstructed the lights.
(A) numbers of ospreys, whose huge nests
(B) numbers of ospreys, their huge nests
(C) amounts of ospreys, the huge nests of which
(D) nests of ospreys they
(E) numbers of ospreys, and their huge nests


I have read somewhere that "numbers of" is incorrect to use.

Please look at the respective options and explain.