ACCorDing to thE pAssAgE, up to now, Anti-DrAg EDuCAtion ______
A．hAs mADE All pEoplE sEE thE DAngEr oF Drugs
B．hAs suCCEEDED in DissuADing pEoplE From using Drugs
C．hAs BEEn EFFECtivE only to A CErtAin DEgrEE
D．hAs provED to BE A totAl FAilurE