“At the end of every day, we wipe off the blackboard with wet
sponge to make it clean and ready to use for the next day.
After a few minutes, the water disappeared.
Why did the water disappear?
A. The water disappeared because of the hot temperature.
B. The water disappeared because of evaporation.
C. The water disappeared because it is the way it used to be
D. Never mind of the water