The correct answer to this question is A, Unnaturally imposed by Europeans who had little knowledge of African tribal groups, and who didn’t care about the people in Africa. Between 1875 and 1900, many European nations took over Africa. This period is known as the Age of Imperialism.
European language spread over the areas they took over, along with their many beliefs including Christianity. The Europeans believed they were superior to the Africans. For this reason, they enslaved them and controlled their every move. This brainwashing made the Africans think this about themselves and submit to the will of the Europeans.