How was the rise of the kingdom of ghana similar to the rise of the kingdom of songhai during the postclassical era - apex

I believe it is “Both developed economic power by controlling valuable trades.”

explanation:

with the profits from the european sales, merchants purchased europe's manufactured  goods, including tools and weapons. then the merchants shipped those manufactured  goods, along with the  american  sugar and rum, to west africa where they were bartered for  slaves.

1. senate

2.there is no diagram

3.education