In American Trucking Association V

In American Trucking Association v.Environmental Protection Agency,where the American Trucking Association challenged the EPA's approval of California's regulation of engines that run transportation refrigeration units,the Court of Appeals denied the ATA's petition for review because:

A) the EPA's conclusion that California's rule was consistent with the Clean Air Act was reasonable and reasonably explained
B) the EPA has authority to do whatever it wants
C) the ATA did not follow the proper procedure for review
D) there would be no cost for businesses to comply with California's rule
E) the rule is scheduled to be implemented at a national level