Consider the following statements: I) Real gases act more like ideal gases as the temperature increases. II) When n and T are constant, a decrease in P results in a decrease in V . III) At 1 atm and 273 K, every molecule in a sample of a gas has the same speed. IV) At constant T, CO2 molecules at 1 atm and H2 molecules at 5 atm have the same average kinetic energy. Which of these statements is true