Which Description of the Kinetic-Molecular Theory of Gases Is True

Which description of the kinetic-molecular theory of gases is true?

A) The space between two gas molecules is much greater than the size of each gas molecule.
B) The forces of attraction and repulsion do not exist for gas molecules.
C) Colliding gas molecules have the same speed before and after the collision.
D) Gas molecules move randomly in all directions with the same speed.
E) Gas molecules lose energy with every collision and will eventually stop moving.