With Regard to the Rulers of the West African Coastal

With regard to the rulers of the West African coastal states of Dahomey and Asante, which of the following statements accurately describes the impact of the slave trade on their kingdoms?

A) Although they controlled aspects of the slave trade, the rulers of Dahomey and Asante were merely the puppets of European traders who controlled them and the territory they governed.
B) The rulers of Dahomey and Asante oversaw the emergence of powerful kingdoms.
C) Since the Europeans completely controlled the slave trade, the rulers of Dahomey and Asante were merely figureheads with no real power.
D) Although the rulers of Dahomey and Asante allowed the Europeans to control the slave trade, they acquired power and wealth by gaining control over the trans-Saharan trade.