Which Statement Best Describes the Balance of Federalism Since the Adoption

Which statement best describes the balance of federalism since the adoption of the Constitution?

A) The balance of power between the states and the national government has remained stable.
B) The authority of the states has consistently increased at the expense of the national government.
C) The balance of power between the states and the federal government has shifted back and forth.
D) The authority of the federal government has increased, while the states have lost some powers.