What was the most significant factor in the development of early societies in west africa?

This was an order issued during the civil war by president lincoln ending slavery in the confederate states

How and why did many southerners attempt to stop the laws congress passed?

Which of these statements describes a long-term impact of european imperialism in africa? a. african countries joined together to present a united front against imperialism. b. europeans paid african countries after colonizing them, offering these new countries a fresh start. c. european powers drew the current borders, splitting ethnic groups among modern countries. d. africans became more loyal to their countries than to their ethnic groups.