When Energy Is Added to a Gaseous System, What Happens

Multiple Choice

When energy is added to a gaseous system, what happens to the particles of that system?

A) Nothing, really. They remain in motion.
B) The kinetic energy of the particles increases, but in an exponential relationship.
C) The kinetic energy of the particles decreases, to compensate.
D) The kinetic energy of the particles increases as well.