【单选题】The questions in this group are based on the content of a passage. After reading the passage, choose the best answer to each question. Answer all questions following the passage on the basis of what i...
A.
To explain how a loophole in the Clean Air Act allows power plants to avoid compliance with emissions restrictions
B.
To raise awareness of the problems caused by sulfur dioxide emissions from coal- burning power plants
C.
To argue against a specific implementation of the Clean Air Act that relates to greenhouse gas emissions
D.
To argue that companies should not exploit a loophole in the Clean Air Act concerning an atmospheric pollutant
E.
To advocate the passage of a new Clean Air Act that places limits on sulfur dioxide emissions