Question

what happens if a state passes a law that the supreme court deems contrary to the u.s. constitution?
the state law is declared unconstitutional.
the state law is valid only in that state.
the state law is mediated in court.

Explanation:

The U.S. Supreme Court has the power of judicial review, which allows it to declare laws (including state laws) unconstitutional if they conflict with the U.S. Constitution. So if a state law is deemed contrary to the Constitution by the Supreme Court, the law is declared unconstitutional. The other options are incorrect: a law contrary to the Constitution isn't valid even in the state, and "mediated in court" isn't the outcome for an unconstitutional law (judicial review results in a declaration of unconstitutionality).

Answer:

A. The state law is declared unconstitutional.