some water dripped over the side. the water soaked through the glass. water vapor condensed on the sides. someone sprayed the glass with water.
I gave my students this multiple choice question: A glass of cold water is set on a desktop. Later that day, beads of water had formed on the outside of the glass. The most likely explanation for the beads of water is that

Only one answer is correct among these 4 choices:
- some water dripped over the side.
- the water soaked through the glass.
- water vapor condensed on the sides.
- someone sprayed the glass with water.

Could you tell me which one is correct?

water vapor condensed on the sides.