Question: If you breathe on a mirror, part of the mirror clouds up. What are you actually seeing when you see the mirror cloud up?

  Options: 
 A. Water droplets that formed from cooled water vapor in your breath
 B. Carbon dioxide that you are breathing out from your lungs
 C. Oxygen that you are breathing out from your lungs
 D. Cooled nitrogen in the air around you
Answer: A