Answer: C. The attraction between particles causes a gas to condense at low temperatures
Explanation: The Kinetic Molecular Theory explains that the gas are in constant motion and collide with each other and with the walls of the container.
The average kinetic energy of the particles depends only on the temperature.
Speed is directly proportional to the square root of the temperature.
As already mentioned second option also satisfies the theory that the particles in a gas travel in straight lines in a continuous, random motion.
The particles in a gas make up a small portion of the total volume of the gas. This option also correctly fits for the theory.
But option c is not correct.