Renata is trying to find out what effects the clean air act of 1990 had. she comes across this information on a governmental website: the 1990 clean air act amendments programs are projected to result in a net improvement in u. s. economic growth and the economic welfare of american households. … [c]leaner air leads to better health and productivity for american workers as well as savings on medical expenses for air pollution-related health problems. the beneficial economic effects of these two improvements alone are projected to more than offset the expenditures for pollution control. what text evidence supports renata’s inference that when people feel better, they perform better at work? a. [c]leaner air leads to better health and productivity for american workers … b. [c]leaner air leads to … savings on medical expenses for air pollution-related health problems. c. the 1990 clean air act amendments programs are projected to result in a net improvement in u. s. economic growth … d. the beneficial economic effects of these two improvements alone are projected to more than offset the expenditures for pollution control.