求大神解这道语法题

In addition to her work on the miocene homicide fosiil record, Mary Leakey contributed to archaelogy with her discovery of the earliest direct evidence of hominid activity and painstakingly documenting East African paintings.

(A) Leakey contributed to archaeology with her discovery of the earliest direct evidence of hominid activity and painstakingly documenting

(B) Leakey contributed to archaeology by her discovery of the earliest direct evidence of hominid activity and by painstakingly documenting

(C) Leakey was a contributor to archaelogy with her discovery of the earliest direct evidence of hominid activity and with her painstaking documentation of

(D) Leakey's contributions to archaelogy include her discovery of the earliest direct evidence of hominid activity and her painstaking documentation of

(E) Leakey's contributions to archaelogy include her discovering the earliest direct evidence of hominid activity and painstaking documentation of

I chose C because "with her discovery.." and "with her painstaking documentation of" seem parallel. What's wrong with my reasoning?