Which of the following would be an example of how federal bureaucrats make rules while engaging in implementation ?

the Supreme Court ruling that the Environmental Protection Agency has no authority to regulate auto emissions under the Clean Air Act

the Environmental Protection Agency requiring that, under the Clean Air Act, the average fuel economy for new vehicles must be at least 35.5 miles per gallon

the Chamber of Commerce filing a lawsuit claiming that Congress has no authority to pass the Clean Air Act

the Senate Committee on Environment and Public Works filing a report on the efficacy of the Clean Air Act