Showed that people learn to behave in certain ways because of reinforcement.
a. john
b. watson
b. b. f. skinner
c. william james
d. sigmund freud

The correct answer is:B.F. Skinner.

Skinner was the most influential researcher in the framework called Behaviourism, a framework in psychology that tries to examine only behaviour and not make claims about the internal states of the organism. We worked on positive and negative reinforcement.