Whenever you take a shower in your bathroom at home, the water in the shower turns icy cold just as the toilet in another bathroom is flushed, causing you to cringe. After several such experiences, you find that you tend to cringe whenever you hear a toilet flush, even when you are not in the shower. In this example of classical conditioning, what is the unconditioned stimulus?

• A. The sound of the flushing toilet
• B. The sight of your bathroom shower
• C. The cold water
• D. The cringing