Suppose that a substance in a beaker is heated over a burner in a science lab. Which observation would most likely indicate that a chemical change has occurred in the substance?

A .If the substance is a liquid or solid, an increase in temperature would indicate a
chemical change.
B.If the substance is a liquid, a change of some of the liquid to gaseous form would
indicate a chemical change.
C. If the substance is a solid, a change of some of the solid to liquid form would
indicate a chemical change.
D.If the substance is a liquid or solid, production of an odor would indicate a
chemical change.