I agree with the person above - the correct answer is B. the United Nations.
The United Nations is an organization created in 1945 after WWII, with the aim to prevent a war like that from ever happening again. At the moment, there are 193 countries included in this organization, who are there to cooperate in order to maintain world peace and security.
"European colonial powers established boundaries before vacating the lands" is the one among the following choices given in the question that shows how most <span>of the political boundaries of Africa were created. The correct option among all the options that are given in the question is the third option or the penultimate option. </span>