Which of the Following Statements About the African Slave Trade

Which of the following statements about the African slave trade is false?

A) African leaders who cooperated with European slave traders became rich from the slave trade.
B) The Songhai leaders in northwest Africa sold slaves for horses and guns.
C) The Obas in Benin banned the export of males from their territories until the end of the seventeenth century.
D) none of these choices
E) all of these choices