heating a pan of water until the water is all gone putting a soft-drink can in the refrigerator to cool it heating soup on the stove until it is hot to your tongue transferring sugar into a storage container
I gave my students this multiple choice question: Which of the following is an example of matter changing state?

Only one answer is correct among these 4 choices:
- heating a pan of water until the water is all gone
- putting a soft-drink can in the refrigerator to cool it
- heating soup on the stove until it is hot to your tongue
- transferring sugar into a storage container

Could you tell me which one is correct?

heating a pan of water until the water is all gone