According to the Tenth Amendment, the powers are limited to only those specifically listed in the Constitution.

The correct answer is B. the states.

Explanation: The Tenth Amendment to the U.S. Constitution states that the powers not delegated to the federal government, nor prohibited to the states, are reserved for the states or the people. This amendment emphasizes the principle of federalism and limits the scope of federal authority, allowing states to have powers that are not explicitly mentioned in the Constitution.