PLEASE ANSWER

Mary put 5 cups of water in a pan and placed it on the stove. She let it boil for 10 minutes. She measured the water again and discovered she only had 4 cups of water. What happened to the missing water?

A. 1 cup of the water must have condensed and is now in the air.
B. Mary must have not measured correctly since water cannot be destroyed.
C. 1 cup of water was destroyed by the heat.
D.1 cup of water became gas and is now in the air.