Answer:
Right choice:
Africans crossed into South America when Africa and South America were one continent.
Explanation:
Such a statement is totally absurd. Humans as a species had not appeared on planet Earth when present-day Africa and South America were part of the same land mass hundreds of millions year ago. So, African could not cross to South America in the times of Pangea, the only megacontinent in the planet´s evolution. The other options are theories of the origins of man in the Americas, though there´s no consensus in the academic community.
This was in the period of the great depression
Well, has a primary source, it’s probably A. person
These societies arose from a blend of old populations familiar with the environment and new immigrants with fresh skills to impart.