Regarding Megafaunal Extinctions,it Is

Regarding megafaunal extinctions,it is

A) assumed that climate change is the driving factor.
B) assumed that,in the North American continent,the Ice Age was the driving factor.
C) assumed that the dramatic differences between the ancient megafauna in North America and those found in Africa were the reason that the North American megafauna could not adapt and survive.
D) assumed that the coevolution of African megafauna with humans is the reason they did not go extinct.
E) assumed that the island megafauna mostly drowned in flooding as the icepack melted at the end of the Ice AgE.