How did the Trans-Atlantic Trade affect warfare amongst African groups?

Question

Responses
A Warfare amongst African groups was stabilized as a result of the Trans-Atlantic Trade.Warfare amongst African groups was stabilized as a result of the Trans-Atlantic Trade.
B While some groups became wealthy as a result of the Trans-Atlantic Trade, warfare did not change.While some groups became wealthy as a result of the Trans-Atlantic Trade, warfare did not change.
C Warfare amongst African groups decreased as the West Africans banned together against the Europeans.Warfare amongst African groups decreased as the West Africans banned together against the Europeans.
D Warfare amongst African groups increased as a result of the Trans-Atlantic Trade and a decrease in population.

Answer 1

D Warfare amongst African groups increased as a result of the Trans-Atlantic Trade and a decrease in population.