In Pavlov's Famous Physiological Experiments with Dogs, He Paired a Bell

Multiple Choice

In Pavlov's famous physiological experiments with dogs, he paired a bell with presentation of food. Over a period of time, dogs were observed to start drooling (salivating) when they heard the bell only. What was the conditioned stimulus:

A) skeletal nervous system
B) Pavlov himself
C) salivation
D) bell
E) meat powder