Which of the following statements are true about the Central Arizona case? (There can be more than ...

Which of the following statements are true about the Central Arizona case? (There can be more than one correct answer.)
 a. Emissions from the Navajo Generating Station (NGS) were greatly degrading the view of the Grand Canyon.
  b. The cost of reducing emissions from the (NGS) was trivial.
  c. The EPA performed a cost-benefit analysis before ordering the NGS to reduce its emissions.
  d. Under the Clean Air Act, the cost of reducing the emissions was irrelevant.
  e. A court may overturn an EPA order if it believes that the preponderance of the evidence is on the plaintiff's side.