Which of the following is an example of a "command and control" approach to reducing pollution? select one: a. in 1990 congress approved measures designed to reduce sulfur dioxide emissions to 8.5 million tons annually by 2010 trough tradable permits. b. in 1983 the u. s. government required the installation of catalytic converters to reduce emissions from all new automobiles. c. the u. s. government issued electric utilities tradable emissions allowances in other to reduce emissions of nitrogen oxide. d. the government imposed a tax on electric utilities to reduce damages from acid rain.