Which Piece of Evidence BEST Supports the "Out of Africa

Question

Which piece of evidence BEST supports the "out of Africa" model of the evolution of modern humans?
A) African populations show the greatest diversity in numbers at a short tandem repeat (STR) locus on chromosome 12.
B) African Homo ergaster/erectus appear almost simultaneously with Asian Homo erectus, 1.6 to 1.9 million years ago.
C) Both Indonesian fossil Homo erectus and modern Australian aboriginal populations (which probably reached Australia by way of Indonesia) have unusually prominent and straight brow ridges.
D) In most regions, there does not seem to be a rapid replacement of earlier hominins by Homo sapiens.
E) There is no solid evidence supporting the "out of Africa" hypothesis.

Accepted Answer

African populations showing the greatest diversity in numbers at a short tandem repeat (STR) locus on chromosome 12 supports the "out of Africa" model by suggesting that modern humans originated in Africa and then spread to other parts of the world. This genetic diversity is consistent with the theory that populations that have been in an area for a longer period have more genetic variations.