Is introduced. That is the correct answer!
John D. Rockefeller- Oil Strike
Serfs were peasants who belonged to masters almost as property.
A black flourishing of ideas and expression. African-Americans create new ways to advance not only their own identity, but national identity as well.
Checks and Balances system
Separation of Powers in the United States is associated with the Checks and Balances system. The Checks and Balances system provides each branch of government with individual powers to check the other branches and prevent any one branch from becoming too powerful.
