> (B) Nobody needs to prove cannabis is helpful to show that it's an extreme social injustice to imprison people for its use. The specific nature of American f

> (B) Nobody needs to prove cannabis is helpful to show that it's an extreme social injustice to imprison people for its use. The specific nature of American federal drug laws concerning cannabis makes dodgy medical research an effective method for breaking those laws down. And the severity of the American penal system makes it easy for activist researchers to decide that the ends justify the means.