Which of the following statements describes the MAIN idea of Article IV?
 A
 The government of the United States will protect every state from harm.
 B
 Every state in the United States must have the same laws, which are created by Congress.
 C
 Each state of the United States has certain rights and responsibilities; Congress makes decisions about states.
 D
 Congress is in charge of the land in the United States; only Congress can determine whether land is made into a state.