Ozone in the Upper Atmosphere Is Important to Life on Earth

Ozone in the upper atmosphere is important to life on earth because it converts harmful UV radiation to heat.How does the release of CFCs into the atmosphere affect the concentration of ozone in the upper atmosphere?

A) The Cl in the CFC catalyzes the decomposition of ozone decreasing its concentration.
B) The Cl in the CFC catalyzes the production of ozone increasing its concentration.
C) The NO₂ in the CFC catalyzes the decomposition of ozone decreasing its concentration.
D) The NO₂ in the CFC catalyzes the production of ozone increasing its concentration.
E) The CFC's change the ozone into photochemical smog.