You are presented with the question "What is one way to lower the freezing point of water?" and the following answer choices: 
- add a solute
 - purify it
 - Solutions
 - remove impurities
 - Calcium carbonate
 - add water
 - evaporation
 - Dehydration

Now knowing that adding salt to a solid decreases the freezing point of that solid and solutes decrease the freezing point or the point of crystallization of water, choose the best answer.


 

 add a solute        