HOW do the first three visual depictions and the details in the article emphasize similar ideas?

(A) Both emphasize the idea that Europeans felt they had a right to power over Africa and its people.

(B) Both emphasize a contrast in European attitudes toward Africa before and after the slave trade.

(C) Both emphasize the fierce struggles between European countries before the Congress of Berlin.

(D) Both emphasize the important role Belgian colonial rulers played in disseminating ideas of imperialism.