Martha Trains Her Cat Whiskers to Salivate to the Sound

Multiple Choice

Martha trains her cat Whiskers to salivate to the sound of a bell. She rings the bell every 15 minutes and doesn't follow it with food for Whiskers. It salivates less and less and finally stops salivating at the sound of the ringing bell. A week later, she finds Whiskers salivating to the sound of a ringing bell. Which of the following terms explains this response?

A) counterconditioning
B) instinctive drift
C) spontaneous recovery
D) stimulus discrimination