Why does the pressure of a gas sample increase when the temperature is increased? Assume the volume remains constant. Select all that apply. Choose one or more: O A. The average kinetic energy of the gas increases as the temperature increases, causing more energetic collisions with the walls. O B. As the temperature of the gas increases, the gas particles increase in size causing a higher pressure. O C. The increase in temperature causes more collisions of the gas particles with the walls. O D. As the temperature of the gas increases, the volume of the gas decreases causing the pressure to increase.