Air is made up primarily of nitrogen and oxygen. In an enclosed room with a constant temperature, which of the following statements is correct concerning the nitrogen and oxygen gases?

(A) The nitrogen gas molecules have a higher velocity than the oxygen gas molecules.

(B) The nitrogen gas molecules have the same velocity as the oxygen gas molecules.

(C) The nitrogen gas molecules have a lower velocity than the oxygen gas molecules.

(D) It is impossible to compare the velocity of the two gases without knowing the temperature of the air and the percentage of nitrogen and oxygen in the room.