The most favorable locations for the growth of glaciers, rather than being the cold, dry polar regions, would be instead the cool, moist middle latitudes, where there is abundant precipitation and where it is cold enough to allow some snow to accumulate year by year.

(A) glaciers, rather than being the cold, dry polar regions, would be instead the cool, moist middle latitudes

(B) glaciers are not the cold, dry polar regions but the cool, moist middle latitudes

(C) glaciers are the cool, moist middle latitudes rather than the cold, dry polar regions

(D) glaciers, instead of being the cold, dry polar regions, would be the cool, moist middle latitudes（B）

(E) glaciers are, instead of the cold, dry polar regions, rather the cool, moist middle latitudes

Please tell me why not C?Because "rather than "is a conjunction?

Look at the bold-faced words:

The argument says "where there is abundant precipitation and where it is cold enough to allow some snow to accumulate year by year.

(C) glaciers are the cool, moist middle latitudes rather than the cold, dry polar regions

 they are saying the opposite, and hence can not be matched. So C is wrong