17. Efforts to disrupt the supply of drugs into the United States was a key component of the Reagan-era "War on Drugs." One criticism of the policy was the argument that the policy would have very little impact on the quantity of drugs purchased and a very large impact on expenditures among a group of individuals already in precarious financial conditions. This criticism likely rested on the assumption that:

a. Drugs are a normal good.

b. Drugs are a luxury good.

c. The demand for drugs is price inelastic.

d. The demand for drugs is price elastic.