Which of the following statements best describes how the Constitution provides for a federal system of government?   A

Which of the following statements best describes how the Constitution provides for a federal system of government?

A. The Constitution defines the powers of government and then expressly indicates which powers are assigned to the federal government and which are assigned to the states.

B. The Constitution defines the powers of the federal government and reserves the unlisted powers for the states.

C. The Constitution gives the federal government the authority to decide which powers it will exercise while also giving the states wide leeway in defining their powers.