One Saturday, Adolf Was Sitting at Home When the Telephone

Multiple Choice

One Saturday, Adolf was sitting at home when the telephone rang.A local company was making promotional calls and told Adolf he had just won a $1,000 gift certificate.He felt a rush of excitement at the thought of what he could do with $1,000.Now Adolf finds that whenever he hears a telephone ring, he feels a small surge of excitement.In this example of classical conditioning, the conditioned stimulus is:

A) the ringing of a telephone
B) the rush of excitement that Adolf felt when he won the gift certificate
C) the news that he had won a $1,000 gift certificate
D) the rush of excitement that Adolf feels whenever he hears a ringing telephone