How was the early slave trade in West Africa different from that of East Africa?

ASlaves from West Africa were generally sold in European and Asian countries, while slaves from East Africa were generally sold in southern Africa.

BSlaves from West Africa were generally sold in African and European countries, while slaves from East Africa were generally sold in Persia and Mesopotamia.

CSlaves from West Africa were generally sold in Asian and American countries, while slaves from East Africa were generally sold in the Middle East.

DSlaves from West Africa were generally sold