some of the water was absorbed by the dish. the air condensed. the light shining on the window sill produced more sugar. the water evaporated.
I gave my students this multiple choice question: A dish of sugar water was left on a window sill. One week later, there were only sugar crystals left in the dish. The water was gone. The best explanation for the appearance of sugar crystals is

Only one answer is correct among these 4 choices:
- some of the water was absorbed by the dish.
- the air condensed.
- the light shining on the window sill produced more sugar.
- the water evaporated.

Could you tell me which one is correct?

the water evaporated.