In the 1960s, the federal government passed the Civil Rights Act and the Voting Rights Act, which compelled state and local governments to desegregate public schools and public places. This is an example of which of the following aspects of federalism in the United States?
A) State governments are slower to implement policy than the national government
B) The system of checks and balances between state and federal government can fail under certain conditions
C) National policy change rarely emerges from state or local government experiments
D) Pressure at the national level can force state and local policy changes