In the Massachusetts V

In the Massachusetts v.Environmental Protection Agency case,the Supreme Court found that:

A) the EPA did not have statutory authority to regulate the emission of greenhouse gasses from new motor vehicles.
B) courts may reverse any administrative agency action found to be arbitrary, capricious, or an abuse of discretion.
C) the Clean Air Act provides a narrow definition of "air pollutant," but the EPA has the authority to clarify the definition.
D) All of the above.
E) Both (a) and (b) .