Question: To create a air-conditioned fan,

  Options: 
 A. Take a box fan and put a frozen jug of water that was filled all the way. Turn on the fan and you can feel the temperature drop. It will last about eight hours before the jug is thawed.
 B. Take a box fan and put a frozen glass of water that was filled all the way. Turn on the fan and you can feel the temperature drop. It will last about eight hours before the jug is thawed.
Answer: A