Robert was late for school, so he parked in a space reserved for teachers. later, when he went to get his car, he noticed a yellow parking ticket under the windshield wiper. the parking ticket would be

a. continuous reinforcement.
b. negative punishment.
c. positive reinforcement.
d. negative reinforcement.
e. positive punishment.

c. positive reinforcement.                      

Explanation:

Positive reinforcement: In psychology, the term positive reinforcement is first being used in the experiment of operant conditioning.

Positive reinforcement is defined as involving a reinforcing stimulus that follows a particular behavior and makes the behavior most likely to occur again in the future. Because of the reinforcing stimulus, the tendency of the behavior to occur in future will be strengthened.

Example: A teacher gave his student good remarks for doing homework

In the question above, the parking ticket would be considered as positive reinforcement.

it continues in business

i would say b. research typically uses a variety of sources