Question: A person in a dark room looking through a window can clearly see a person outside in the daylight. But a person outside cannot see the person inside. Why does this happen?

  Options: 
 A. There is not enough light being reflected off the person in the room.
 B. Light rays cannot pass through a window twice.
 C. Outside light does not pass through windows.
 D. Sunlight is not as intense as other sources of light.
Answer: A