What is the major difference between the particles in a liquid and a gas of the

What is the major difference between the particles in a liquid and a gas of the same substance at the same temperature? (I think C. but i dont know) A. The particles in the gas are moving faster than the particles in the liquid.
B. The particles in a liquid are still connected, but the particles in a gas have seperated from each other and now fly around to fill the container.
C. The particles in the liquid have higher masses than the particles in the gas.
D. The particles in the gas are seperated, so they absorb less heat than normal, which is why gases are typically cooler than liquids.