Which of the following is an example of federalism?

A. A state retains police powers not expressively granted to the federal government.
B. The federal government has more powers than the state government.
C. If state and federal government statutes conflict, the federal statute takes precedence.
D. If state and federal government statutes conflict, the state statute takes precedence.
E. Local legislation takes precedence over state or federal legislation.

A. A state retains police powers not expressively granted to the federal government.

States retain police powers and all other powers not expressly granted to the federal government—a practice referred to as "federalism"—the sharing of power among national, state, and local governments.