A gas is being cooled down. Which option describes what will happen?
A) The gas particles will move slower and slower. After a while, they will stop.
B) The gas particles will move faster and faster. After a while, the gas will become something else.
C) The gas particles will move faster and faster. Eventually they will start clumping together and become a liquid.
D) The gas particles will move slower and slower. Eventually they will start clumping together and become a liquid.