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 the African landscape Ⅲ. What caused the initial spurt in Homo’s brain growth
A. Ⅰ only B. Ⅲ only C. Ⅰ and Ⅱ only D. Ⅱ and Ⅲ only E. Ⅰ, Ⅱ, and Ⅲ