Even at moderate temperatures, attractions between molecules seem to have little effect on the elasticity of gas-gas collisions is as a result of Choice B: Collisions are so brief, and molecules moving so fast, the attractions have insufficient time to significantly affect the system.
As a result of the high kinetic energy of gases; the movement of gases is so fast and randomised.
As such, during gas-gas collisions; The collisions are so brief and molecules moving so fast, the attractions have insufficient time to significantly affect the system.
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