Which of the Following Illustrates the Concept of Craving

Multiple Choice

Which of the following illustrates the concept of craving?

A) A man ingests an aspirin to rid himself of a strong headache.
B) A hungry rat presses a lever to obtain a food pellet.
C) A rat presses a lever that results in delivery of a shock through the floor of the chamber.
D) A woman injects heroin into her veins to obtain a "rush."
E) An injection of cocaine reinstates responding for intravenous cocaine in a rat that underwent extinction of cocaine responding.