The law of effect was most clearly highlighted by

A. Pavlov's studies of conditioned salivation.

B. Garcia and Koelling's research on taste aversion.

C. Skinner's experiments on reinforcement.

D. Watson and Rayner's findings on fear conditioning.

Answer: The law of effect was most clearly highlighted by

C. Skinner's experiments on reinforcement.

Explanation:

The Law of Effect finds that when one is exposed to a satisfying event it becomes more likely to never repeated; when receives an unsatisfying event, the action becomes less likely to be repeated.

B. F. Skinner's work on operant conditioning and reinforcement most clearly highlight this law.