An Experimenter Finds That a Certain Male Subject Always Has

Multiple Choice

An experimenter finds that a certain male subject always has an increased heartbeat when he hears a certain piece of music. The experimenter sounds a buzzer and then plays the piece of music. The experimenter repeats this procedure until the man responds with an increased heartbeat to the sound of the buzzer alone. In this situation, the unconditioned response is ________.

A) the piece of music
B) the sound of the buzzer
C) listening to the music
D) an increased heartbeat