Answer:
The answer is: b. ghana, mali, songhai.
Step-by-step explanation:
Trans Saharan trade refers to the traffic of goods through the Sahara to reach Sub-Saharan Africa from the coast of North Africa, Europe or the Levant since prehistoric times.
The rise of the Empire of Ghana was on a par with the growth of the Trans Saharan trade.
Mali was a Muslim kingdom, and under this, the gold and salt trade continued.
Most of the money circulating in the western half of the Islamic world between the twelfth and seventeenth centuries was exchanged with the gold of western sub-Saharan Africa, and competition for the wealth generated by trade generated significant growth in West Africa, in medieval empires like Ghana, Mali and Songhai.
The answer is: b. ghana, mali, songhai.