The temperature of the liquid increased, or the liquid became a gas. The temperature of the liquid increased, or the liquid became a solid. The temperature of the liquid decreased, or the liquid became a gas. The temperature of the liquid decreased, or the liquid became a solid.
I gave my students this multiple choice question: During an investigation, heat transferred from a liquid to the environment. Which pair of explanations can best account for this result?

Only one answer is correct among these 4 choices:
- The temperature of the liquid increased, or the liquid became a gas.
- The temperature of the liquid increased, or the liquid became a solid.
- The temperature of the liquid decreased, or the liquid became a gas.
- The temperature of the liquid decreased, or the liquid became a solid.

Could you tell me which one is correct?

The temperature of the liquid decreased, or the liquid became a solid.