The fact that Magnus begins salivating and wagging his tail indicates that the word "sit" is a ________.

A) conditioned response
B) unconditioned response
C) conditioned stimulus
D) result of negative reinforcement

Magnus has associated the word "sit" with receiving a strip of bacon and a pat on the head, which are unconditioned stimuli that naturally cause a positive response (salivating and wagging the tail). Therefore, the word "sit" has become a conditioned stimulus that elicits a conditioned response (salivating and wagging the tail).