Well, the Kings benefited a lot from this because they were the rulers of the land. The knights protected the land and were offered social status. The Serfs were the farmers and were given protection under the kingdom.
It is false! I quote 'False' Believe Me M8
Sorry this is kind of late, but the answer is C. Western Europe and Sub-Saharan Africa.
Yes Power is divided between the a national government and state government.
The Federalism is the system of government in which power is divided between a central government and regional governments in the United States, both the national government and the state governments possess a large measure of sovereignty. Hope this helps, good luck.