I DONT NEED HELP JUST GIVING YOU GUYS THE ANSWER I TOOK THE TEST! Which statement explains how two gases at the same temperature can diffuse at different rates?

They have different molar masses but the same velocities.
Their average kinetic energies are the same, but the smaller molecules have faster velocities.
Their kinetic energies differ, but their masses are the same.
They have the same masses but different velocities.

The answer is: Their average kinetic energies are the same, but the smaller molecules have faster velocities.