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 LACE>AfricaLACE>’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