Question

if you clean your room to put an end to your fathers constant nagging on the subject, your room - cleaning response has been
o positively reinforced.
o negatively reinforced.
o discriminated.
o extinguished.

Explanation:

Positive reinforcement adds a pleasant stimulus, negative reinforcement removes an aversive one. Here, cleaning the room removes the aversive stimulus of father's nagging.

Answer:

C. negatively reinforced