An Animal Is Conditioned to Salivate to the Sound of a Bell

Multiple Choice

An animal is conditioned to salivate to the sound of a bell, using Pavlovian procedures. After the conditioning is established, the animal is then put through an extinction procedure and the conditioned salivation disappears. Then the animal is removed from the test situation for several days. When returned to the test situation, which of the following would be evidence of spontaneous recovery?

A) the animal doesn't seem to even notice the bell
B) the animal only eats when the bell rings
C) the animal salivates when the bell rings
D) the animal becomes aggressive in the test chamber