Which of the Following Statements Is False

Which of the following statements is false?

A) Gas molecules collide with each other without loss of energy
B) Gas molecules collide with the container walls without loss of energy
C) The pressure of a gas at constant temperature in a sealed container will gradually decrease
D) Because of the relationship between temperature and average molecular speed, the temperature of a gas would drop if energy were lost in collisions
E) Friction does not slow down gas particles and cause them to stop moving