A Hamster Is Trained to Push a Lever to Earn

Multiple Choice

A hamster is trained to push a lever to earn a food pellet each time it hears a bell.When a buzzer sounds, pushing the lever does not result in food delivery.The hamster quickly learns to respond to the bell and does not respond to the buzzer.We can conclude

A) the hamster has learned to respond only when the S+ is present.
B) the hamster has learned to suppress responding only when the S- is present.
C) the hamster has learned to respond only when the S+ is present and to suppress responding only when the S- is present.
D) that more information is needed to determine what the hamster has learned.