Arrange the following steps in the catalytic destruction of stratospheric ozone by Chlorofluorocarbons (CFCs) in the correct sequential order from start to finish: 1. Photolysis of CFCs by solar ultraviolet (UV-C) radiation to release highly reactive chlorine free radicals. 2. Reaction of chlorine free radicals with ozone (O3) to form chlorine monoxide radicals (ClO•) and diatomic oxygen (O2). 3. Reaction of chlorine monoxide radicals (ClO•) with atomic oxygen (O) to regenerate the chlorine free radical. 4. Diffusion and transport of stable CFC molecules from the troposphere up into the stratosphere.

Options:

• A: 4 -> 1 -> 2 -> 3
• B: 1 -> 4 -> 2 -> 3
• C: 4 -> 2 -> 1 -> 3
• D: 1 -> 2 -> 3 -> 4

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