Checks and balances is basically how each branch of the U.S. government keeps each other in check.
Judicial review is when the judicial branch reviews a law passed by the legislative branch and can nullify it if it violates the Constitution. Federalism is when the state governments and federal government have equal power. Popular sovereignty is the principle of a government getting its power from the consent of the people.
Explanation: The Bantu form an African ethnic group that inhabit the southern African region of the Sahara Desert. Most of the more than 300 ethnic subgroups are farmers, who also live on fishing and hunting.
The answer is D because, that is the only answer that shows history in the light of great activity. B and C are irrelevant and A, means they were being controlled.