Is Bruno Correct That Only the Federal Government Can Enforce

Is Bruno correct that only the federal government can enforce the Clean Air Act?

A) Yes, he is correct.
B) No, he is incorrect because either the federal government or state environmental agencies may enforce the Clean Air Act.
C) No, he is incorrect because only the states may enforce the Clean Air Act.
D) No, he is incorrect because only the states or individuals may enforce the Clean Air Act.
E) No, he is incorrect because the federal government, individuals, or state environmental agencies may enforce the Clean Air Act regulations involving carbon monoxide emissions.