What was the relationship between Islam and the indigenous religions of Africa?

What was the relationship between Islam and the indigenous religions of Africa?
A) Islamic teachers attempted to eradicate the animist indigenous religions of Africa.
B) Because both indigenous African religion and Islam were monotheistic, the two became inextricably intertwined.
C) Islam accommodated pagan practice and belief in the early stages of conversion, because rulership and authority was still based on the ability to intercede with local spirits.
D) Islam successfully overcame indigenous religious beliefs, and almost all Africans converted to Islam.