The 'Single Origin' Theory of Humankind's Invasion of the World

The 'single origin' theory of humankind's invasion of the world:

A) is the same as the Australian Model.
B) states that all humans are descendants of a shared common ancestor in Africa.
C) states that all humans are descendants of a shared common ancestor in the Americas.
D) is the same as the Multiple Origins Model.
E) explains how the evolutionary paths of a number of versions of Homo came together or converged eventually.