My Dog Anka Often Barks When the Doorbell Rings

Multiple Choice

My dog Anka often barks when the doorbell rings. Anka also has an unusual tendency to watch television (she prefers football to baseball, and hates Westerns) . When the doorbell rings on a television show, she looks alertly but does not bark. This is an example of

A) stimulus generalization
B) stimulus discrimination
C) habituation
D) positive reinforcement