【单选题】

The author provides information that would answer which of the following questions’ Ⅰ. What eventually led to the extinction of the robust proto-humans Ⅱ. What were the causes of the desiccation of theAfrican landscape Ⅲ. What caused the initial spurt in Homo’s brain growth

A、
A、Ⅰ only
B、Ⅲ only
C、Ⅰ and Ⅱ only
D、Ⅱ and Ⅲ only
E、Ⅰ, Ⅱ, and Ⅲ