Black Men Are Sent to Prison on Drug Charges at Thirteen

Black men are sent to prison on drug charges at thirteen times the rate of White men, yet five times as many Whites as Blacks use illegal drugs. This demonstrates how:

A) the "War on Drugs" is has only been effective in reducing drug use by Whites
B) Black men are more likely to plead guilty to drug charges
C) Black men are more likely to sell drugs than Whites, but Whites are more likely to use drugs
D) enforcement of drug laws disproportionately affects people of color