First they would have to be in a anti slavery state, there were also some wealthy African Americans in the time of slavery
B. The second largest continent
One of the reasons why there was a need for reform in the US during the mid-1800s is because the US was expanding economically at a rapid pace, as well as expanding to the west, and there was practically no government oversight of growth--which led to people and firms being taken advantage of.
The walls of Benin city and the other Hausa city states contribute to their development ans success because it <span>protected people and made merchants feel safe</span>