23. Chlorofluorocarbons are known to have a damaging effect on the ozone layer because chlorotrifluoromethane (CF3Cl), once commonly used as a refrigerant, can split into the free radicals CF3 and Cl in the atmosphere. The radical Cl then reacts as follows: Cl(g)+O3(g)ClO(g)+O2(g)ClO(g)+O(g)Cl(g)+O2(g) Which of the following statements is true about the above process? A. Cl(g) is a homogenous catalyst B. ClO(g) is a heterogeneous catalyst C. ClO(g) is a very high-energy transition state. D. Cl(g) is an intermediate E. There are neither catalysts nor intermediates for this reaction