In school, Jarrett learned that salt lowers the freezing point of water. He wants to test this in a home experiment. He combines 1.0 grams of salt and 500 milliliters of water in a container. In an identical container, he pours 500 milliliters of water and does not add salt to it.
 What should Jarrett do next?
 A. 
 Place the salt water in a freezer and the pure water in a refrigerator.
 B. 
 Mix the two samples of water together in a 1.0-liter container, and bring them to a boil on a stove.
 C. 
 Place both containers in a freezer, and record the temperatures at which they begin to freeze.
 D. 
 Place the pure water in a freezer and the salt water in a refrigerator.