Your answer would be B. False. Due to in a hydraulic system, you can have pressure put on gas without gravity as well. Think of it like a shock absorber on a car, when you hit a bump in the road, the shock compresses, not due to gravity, but due to the weight of the car pushing down, while the wheel is pushing up. If anything, it would be closer to maybe, the law of inertia.
Hope this helps!