Why the answer is D but not E? just for the reason of support for V.ing structure?Thanks.

Q19:

New genetic evidence—together with recent studies of elephants’ skeletons, tusks, and other anatomical features—provide compelling support for classifying Africa’s forest elephants and its savanna elephants as separate species.

A.     provide compelling support for classifying

B.     provide compelling support for the classification of

C.     provides compelling support to the classification of

D.     provides compelling support for classifying

E.      provides compelling support to classify

用不定式表目的是最恰当的。

那就是选D？

应该是考察provide的用法吧：

provide的用法：provide sth. for…为…提供…; provide sth. with sth. 为…供应（装备）…