They really help in the process of Africa's state building, creating commercial networks between parts of the continent, and introducing literacy ( especially on northern part of Africa)
They also controlled the sea route between Asia and Africa and managed to maintain the relationship between Africa and the middle east
I think watermark because it has to do with a body of water
im super sure thats...C....sorry if im wronh
The answer is b because I just took my test and got it right so good luck
The movement of groups from one country,place, or locality to another