Which Isn't a Basic Assumption of the Kinetic Theory

Which isn't a basic assumption of the kinetic theory?

A) Gases consist of a large number of tiny particles in constant random motion.
B) The distance between gas particles is large compared with their diameters, and therefore most of the volume of a gas is empty space.
C) Gas particles move in a straight line until they collide with another gas particle or the walls of the container.
D) The average kinetic energy of the particles in a gas is proportional only to the temperature of the gas.
E) All of the above are basic assumptions of the kinetic theory.