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

这道题的答案给了D。我选了E。请教E错在哪里呢？谢谢！

"support for sth" is commonly used and thus considered the idoimatic phrase.