listEning 3 "linguistiCsClAss" {$mEDiAurl} why DoEs thE stuDEnt sAy this: A、shE is DisAgrEEing with thE proFEssor. B、shE is ConFirming thAt shE hAs unDErstooD、 C、shE is trying to imprEss thE othEr stuDEnts. D、shE is ADDing inFormAtion to thE lECturE.