A) Human subpopulations diverged and interbred with other subpopulations, periodically passing genes back and forth so that no group diverged enough for speciation (macroevolution) to occur
B) Homo sapiens came into being in a number of regions, separately, and evolved in a parallel way.
C) Humans who left Africa early were killed off by subsequent waves of more highly-evolved migrants
D) Subpopulations separated long ago and evolved into the five distinct races we now know today
E) Human beings can live anywhere.