Based on kinetic-molecular theory, which of the following are true?   ... ...

Based on kinetic-molecular theory, which of the following are true?   I. At a given temperature, all gases have the same average kinetic energy. II. At a given temperature, different gases have different average velocities. III. The average kinetic energy is proportional to the absolute temperature.  
(A) I only
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in 06. Gases