In the process of cooking, making tea, or mixing paint, you combined substances. Sometimes, the act of mixing substances results in the formation of new substances. If two substances mix and one or more new substances form, a chemical change has occurred. Which event do you think results in a chemical change?

A.
Oil and vinegar mix to make salad dressing.

B.
Copper and zinc mix to make brass.

C.
Salt and water mix to make salt water.

D.
Sugar and water mix to make sugar water.