5. A rule promulgated by the Environmental Protection Agency (EPA) limits the amount of carbon that can be emitted from a cars exhaust system. New York has a state law that allows for much higher emissions. In this situation, under the supremacy clause: Choose one of the following:

	a.	the EPA's decision takes precedence.
	b.	both laws are struck down as invalid.
	c.	both laws are applied concurrently.
	d.	New York's law takes precedence.