One Saturday,Lacey Was Sitting at Home When the Telephone Rang

Multiple Choice

One Saturday,Lacey was sitting at home when the telephone rang.A local company was making promotional calls and told Lacey she had just won a $1,000 gift certificate.She felt a rush of excitement at the thought of what she could do with $1,000.Now Lacey finds that whenever she hears a telephone ring,she feels a surge of excitement.What is the rush of excitement that Lacey felt when she heard she had won in this example

A)  conditioned response 
B)  conditioned stimulus 
C)  unconditioned response 
D)  unconditioned stimulus