Final answer:
Ozone depletion is occurring over the Arctic as well as Antarctica due to the breakdown of ozone molecules by CFCs.
Step-by-step explanation:
The correct answer is D) Ozone depletion is also occurring over the Arctic.
Ozone depletion is a global issue that affects both the Arctic and the Antarctic regions. While the most severe loss of ozone occurred in Antarctica, depletion has also been observed over the Arctic. This depletion is primarily attributed to the breakdown of ozone molecules by chlorofluorocarbons (CFCs).