Mark's Dog,Gus,sits Whenever He Says,"Sit

Multiple Choice

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

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