Select the most correct statement below regarding stratospheric ozone.

a. The natural decomposition reaction has a higher activation energy than ozone decomposition catalyzed by chlorine atoms.

b. One chlorine atom can catalyze the destruction of hundreds to thousands of O₃ molecules.

c. Chlorine atoms react with O₃ to make CIO, another reactive species.

d. The speed with which O₃ decomposes is greatly enhanced in the presence of Cl atoms, which provide a lower-energy reaction mechanism.

e. All of these statements are true.