A tradeoff exists between a clean environment and a higher level of income in that

A、studiesshowthatindividualswithhigherlevelsofincomepollutelessthanlow-incomeindividuals.;
B、effortstoreducepollutiontypicallyarenotcompletelysuccessful.;
C、lawsthatreducepollutionraisecostsofproductionandreduceincomes.;
D、employingindividualstocleanuppollutioncausesincreasesinemploymentandincome.