题目选项分析

In addition to her work on the Miocene hominid fossil record, Mary Leakey's contributions to archaeology include her discovery of the earliest direct evidence of hominid activity and her painstaking documentation of East African cave paintings.

In addition to her work on the Miocene hominid fossil record, Mary Leakey contributed to archaeology by her discovery of the earliest direct evidence of hominid activity and by painstakingly documenting East African cave paintings.