What Legal Standard Is Used to Evaluate Whether a State

What legal standard is used to evaluate whether a state law that restricts content-based speech violates the right to free speech?

A) The law must be narrowly tailored to promote a compelling government interest.
B) The law must have a rational relationship to a government interest.
C) No law passed by a state can restrict content-based speech.
D) The law must have a sound policy justification.