Pretty sure the answer is D.
Answer:
The most important contributions is that the Byzantium Empire was able to preserve a lot of the knowledge and culture from the Roman and Greek Empires.
Because he had power over everything else. He was one of the best president i know what i heard of we had until that trachdy day had to come and takes his life
Popular sovereignty, or sovereignty of the peoples' rule, is the principle that the authority of a state and its government are created and sustained by the consent of its people, through their elected representatives (Rule by the People), who is the source of all political power.
