A Dog, Taught to Salivate to the Sound of a Whistle

Multiple Choice

A dog, taught to salivate to the sound of a whistle, is now going through many trials in which the whistle sound is not followed by food. The dog will probably ________.

A) salivate to the sound at a steady but lower level than initially achieved
B) gradually stop salivating to the presentation of food
C) begin to salivate to other sounds it hears in the environment
D) gradually stop salivating to the sound of the whistle