Cann's studies involving mitochondrial DNA showed that the two deepest branches of the human family tree are African. Which of the following observations explains this statement?

A. that all humans evolved in Africa and only
later migrated to other places
B. that our closest ancestors moved out of
Africa and then evolved into humans
C. that our closest ancestors migrated to two
other continents
D. that all the humans that evolved in Africa
only migrated to two continents
E. None of the answer options is correct.


A

Biology & Microbiology

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