The______ to the U.S. Constitution, which defines the powers and limitations of the federal government, reserves all powers not granted to the federal government to the states.

A) First Amendment
B) Fourth Amendment
C) Eighth Amendment
D) Tenth Amendment

The Tenth Amendment to the U.S. Constitution explicitly states that the powers not delegated to the United States by the Constitution, nor prohibited by it to the States, are reserved to the States respectively, or to the people. This amendment outlines the principle of federalism by ensuring that the federal government operates within its assigned powers, and the states retain sovereignty in other matters.