In Massachusetts V

In Massachusetts v. EPA, where Massachusetts and other states sued to force regulation of greenhouse gases from vehicles, the Supreme Court held that:

A) the EPA has higher authority than Massachusetts in all environmental matters
B) since the EPA asserts that there is no a causal connection between man-made greenhouse gas emissions and global warming, the refusal to regulate such emissions is justified
C) there is no basis for a case because a state cannot sue a federal agency
D) since there is no causal connection between man-made greenhouse gas emissions and global warming, the EPA's refusal to regulate such emissions is permissible
E) none of the other choices are correct