When Ivan Pavlov Noticed That His Dogs Were Salivating Even

When Ivan Pavlov noticed that his dogs were salivating even before they were presented with meat, he ____.

A) gathered another group of dogs to determine if they would do the same thing
B) conducted research showing that his dogs could exhibit other types of behaviors in response to the presentation of meat
C) attempted to see if the dogs could learn to salivate to several different types of stimuli
D) abandoned his research and began studying operant conditioning