In the First Empirical Test of the Ecological Dominance/social Competition

In the first empirical test of the ecological dominance/social competition (EDSC) hypothesis, researchers discovered that __________.

A) in populations with more competition for status, less energy could be devoted to brain evolution, resulting in smaller cranial capacities
B) populations in the process of achieving ecological dominance had larger cranial capacities than those that had already become ecologically dominant
C) women's (but not men's) cranial capacity was positively correlated with the degree to which they engage in gossip
D) population density throughout human evolution was positively correlated with cranial capacity