What Did Bantu Peoples Do as They Began Migrating Out

What did Bantu peoples do as they began migrating out of West Africa?

A) They moved rapidly, absorbing most of the local hunting and gathering populations.
B) They were forced farther and farther west as local populations prevented them from settling in their lands.
C) They swept all before them, eliminating most of the local populations.
D) They conquered all of sub-Saharan Africa, establishing a single empire that eventually rivaled that of ancient Egypt.