The Songhai Empire began to rise in Western Sudan in 1464. What enduring effect did the empire have on the area?
A. The Songhai Empire helped develop other empires in the region.
B. The cities of Timbuktu and Jenne developed into centers of trade.
C. The cities of Timbuktu and Jenne were conquered and then left in ruins.
D. The Songhai Empire helped spread to Christianity throughout the region.
