In pavlov's classical conditioning experiments, the bell was the to be paired with the

The bell was the conditioned stimulus, and the salivation was conditioned response. In this experiment, Pavlov conditioned his dogs to salivate simply by pairing the ringing of a ball often enough with the presentation of food to the point where simply ringing the bell made the dogs think that food was going to be presented afterward, leading to salivation.

It’s either d or b ! but it might be b

Abecause it’s just i.s. i learned this