Mark's Dog, Gus, Sits Whenever Mark Says, "Sit

Multiple Choice

Mark's dog, Gus, sits whenever Mark says, "Sit." Mark now wants to teach Gus a new trick. He wants to teach him to bark every time he says, "Speak," but whenever Mark says, "Speak," Gus just sits. The dog's behavior is an example of

A) habituation.
B) generalization.
C) contiguous occurrences.
D) contingent occurrences.