As the temperature of an object rises, so does the

A. kinetic energy of the object.

B. mass of the object.

C. thermal energy of the object.

D. potential energy of the object.

C. The object is not in motion, ruling out A. We are not adding mass in any way, nor does adding heat to object increase its mass, therefore also ruling out B. Finally, we are not changing the object's position in such a way that gives it a higher ability to do work, ruling out D.