The correct answer is the powers the constitution delegated to it.
During the development of the Constitution, the Anti-federalists were concerned about the size and power of the federal government. Many of these individuals were fearful that a strong federal government would become corrupt, just like Britiain's was before the colonists declared their independence. In order to prevent a tyrannical central government, the Anti-federalists proposed having the federal government only having the powers specifically given to them in the US Constitution.
