Reducing Emissions from Motor Vehicles Can Make Them More Expensive

Reducing emissions from motor vehicles can make them more expensive to buy and maintain. Among the emissions is carbon dioxide, which can contribute to global warming. According to the United States Supreme Court in Massachusetts v. Environmental Protection Agency (EPA) , with respect to carbon dioxide, the Clean Air Act

A) gives the EPA the authority to regulate.
B) prohibits the EPA from regulating because the increased expense.
C) requires the EPA to regulate because of the threat of global warming.
D) says nothing about such regulation.