Throughout United States history, the Supreme Court has developed several principles such as "clear and present danger" and "wall of separation between church and state." These principles show that:

A. the states have been allowed to apply their individual interpretation to the Bill of Rights

B. the application of the Bill of Rights has been consistent since the 1790's

C. judicial review has been used to clarify issues concerning civil liberties

D. civil rights are clearly defined in the Constitution