3. Amy experienced extreme pain at the dentist as a child. Now she goes to a different dentist, but feels her heart race when she arrives, and go down when she leaves. Her heart racing whenever she goes to the dentist is due to ________, and the calming feeling when she leaves is due to ________. (A) classical conditioning, operant conditioning. (B) operant conditioning, classical conditioning. (C) classical conditioning, social learning. (D) operant conditioning, social learning.