Why Is the Incarceration of Drug Offenders a Highly Ineffective

Why is the incarceration of drug offenders a highly ineffective way to reduce the amount of illegal drugs sold in the United States?

A) Because demand for drugs drives the drug market, so incarcerated drug sellers are simply replaced
B) Because sentences for drug offences are so short that they do not act as a deterrent
C) Because most drug offenders are illegal immigrants, so they are deported instead of incarcerated
D) Because with the legalization of medical marijuana, there will be less of a need to police drug sales