James Prescott Joule's Experiments, Such as Stirring a Container Full

Multiple Choice

James Prescott Joule's experiments, such as stirring a container full of liquid, showed that

A) Mr. Joule did not know how to make a good batch of chili.
B) thermal energy is actually a form of energy.
C) all forms of energy are conserved.
D) the "Newtonian" energy forms [kinetic, gravitational, elastic] are conserved.
E) radiant energy is actually a form of energy.