Evidence That Adjunctive Processes Contribute to Drug Abuse Includes the Fact

Multiple Choice

Evidence that adjunctive processes contribute to drug abuse includes the fact that:

A) schedule-induced polydipsia has been used to induce rats to drink excessive amounts of water containing drugs.
B) drug abuse is frequently found in settings that provide sparse levels of reinforcement.
C) Both a and b are correct.
D) Neither a nor b is correct.