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Two identical syringes are filled, one with water and the other with air, and then sealed at the nozzle. When equal force is applied to both pistons, the air-filled syringe compresses significantly, while the water-filled one barely moves. This observation is primarily used to prove: (A) Particles of gases have higher kinetic energy than liquids. (B) Intermolecular spaces in gases are much larger than in liquids. (C) Gases exert pressure equally in all directions. (D) Diffusion is faster in gases than in liquids.