The main economic problem facing most african countries is

lack of diversity
few good ports
shortage of labor
inadequate natural resources

The correct answer is lack of diversity

There are many ports as the continent is huge and surrounded by water on all sides. There is also no shortage of labor since there are millions of unemployed young people. Africa is also abundant in natural resources so it's not that either.

They wanted to make slaves out of them.they wanted force them to move off their landthey wanted to make them grow crops for very little pay.they refused to speak native american languages