Although There Is Now Evidence That Several Human Groups Colonized

Although there is now evidence that several human groups colonized the Americas, those that crossed over through Beringia to reach the Americas did so

A) because they were gradually forced into new territories by the expansion of more advanced agricultural groups in Asia.
B) following herds of big-game animals.
C) in order to take advantage of large flint deposits in South America.
D) because they were fleeing from warlike Cro-Magnon groups.
E) in their search for colder climates, because these Neandertals were adapted to cold weather.