Which of the Following Causes the Unnatural,or Human-Made,destruction of Ozone

Multiple Choice

Which of the following causes the unnatural,or human-made,destruction of ozone?

A) An O₂ molecule absorbs UV energy, which causes it to split into two O atoms.
B) A single O atom combines with an O₂ molecule to form O₃.
C) An O₃ molecule absorbs UV radiation and splits into O₂ + O.
D) A Cl atom reacts with an O₃ molecule creating ClO and O₂.
E) A ClO molecule gives up its O to another single O from an O₃.