Question

A student pours water into a cup and places the cup in a freezer.After many hours ,the water will change from

Answer 1

C. liquid to solid. 
When things get cooler, they go from gas to liquid to solid. If you know water is a solid, and you know it's cooling and changing states, then you can correctly infer that it is changing from a liquid to a solid. 

Answer 2

C liquid to solid because the water will turn to ice and become a solid