The Ecological Dominance/social Competition Hypothesis States That __________

The ecological dominance/social competition hypothesis states that __________.

A) because humans were constantly faced with harsh ecological conditions,they had to evolve high levels of intelligence in order to combat the environment
B) those humans who were best able to compete socially by harnessing the power of ecology tended to acquire more sexual access to mates
C) since humans were able to subdue the hostile forces of nature,the only competition left was among themselves,resulting in the evolution of a larger brain
D) none of the above