listEning 8 "EnvironmEntAl sCiEnCEClAss" {$mEDiAurl} whAt DoEs thE proFEssor mEAn whEn hE sAys this: A、hE wAnts thE stuDEnts to tAkE notEs. B、hE woulD likE thE stuDEnts to pArtiCipAtE. C、hE is imprEssED with thEsE options. D、hE DoEs not plAn to tAlk ABout thE AltErnAtivEs.