What Was a Commonality Shared Between the Asians Who Crossed

What was a commonality shared between the Asians who crossed the Bering Strait and the Europeans who crossed the Atlantic Ocean thousands of years later?

A) Both groups were sent there by powerful monarchs.
B) Both groups were driven by the desire to hunt large mammals.
C) Both groups started as slaves and then gained their freedom during the journey.
D) Both groups trekked during bitter ice ages.
E) Both groups were searching for resources.