What source of income did the majority of the African countries depend on for their prosperity?

A. Mining

B. Conquest

C. Trade

D. Fishing

I think mining ...

The source of income the African countries depended on for their prosperity was Trade

Explanation:

All depended on salt trade as their source of wealth but

this also allowed them to become vulnerable to foreign

manipulation and invasion with those they traded

with. All became mostly Islamic in religion and trade

with Arabs affected the development of these African

kingdoms economically (trade of salt was a source of

wealth) and politically (as many kingdoms fell to

invasions by them eventually).