Suppose that the California legislature passes a law that severely restricts carbon dioxide emissions from automobiles in that state. A group of automobile manufacturers file suit against the state of California to prevent the enforcement of the law. The automakers claim that a federal law already sets fuel economy standards nationwide, and that fuel economy standards are essentially the same as carbon dioxide emission standards. According to the automobile manufacturers, it is unfair to allow California to pass more stringent regulations than those set by the federal law.

1.Since the plaintiff(s) is/are asking for a(n)? they are seeking a/an -----------remedy

2.If the court agrees not to enforce the law it will be because federal law ? state law due to the ?

3.The California law severly restricting carbon dioxide emissions from automobiles in that state is an example of ------law ?

4.The primary source of law at issue here is ----------------law?