Mali and Ghana in West Africa were Muslim kingdoms in the Middle Ages. Which of the following statements explains how Islam was able to replace African religious beliefs?
A.
Christianity was prohibited in North Africa following war with Italy.
B.
Traders in Africa had contact with Arabia and converted to Islam.
C.
Muslims would only trade with other Muslims and forced Africans to convert.
D.
Slaves from the south brought Islam with them during the slave trade.