Randy has been smoking for 20 years and enjoys the smell of cigarette smoke. For Randy, the smell of a burning cigarette would be​

A) ​a negative reinforcer.
B) ​a positive reinforcer.
C) ​a noxious stimulus.
D) ​an unconditioned stimulus.

Noxious Stimulus

An unpleasant or harmful stimulus that can cause pain or discomfort to an organism.

Positive Reinforcer

A stimulus which, when presented after a behavior, increases the likelihood of that behavior being repeated.

Unconditioned Stimulus

A stimulus that naturally and automatically triggers a response without any prior learning or conditioning.