Why we've discarded E...? it's grammatically and logically fine I believe and more concise as compared to A.
E is incorrect :1) Incorrect idiom
: Because of VERBing (Correct Idiom: Because of Noun [OR] Because Clause)2) Other issue in the problem
* ESPECIALLY vs. SPECIALLY
“especially” = “to an unusually high degree” or “more so than comparable things”
These paintings are all attractive, but that one is especially attractive because of its use of chiaroscuro .
“specially” = "done in a special manner"
This dish, which is not on the normal menu, was specially prepared for our guest.
I just overlooked the single letter 'e'..