Question: Is it ever appropriate to use ‘All of the Above’ as a choice?
Question: OK, can I use ‘None of the Above’ as a choice?
Answer: Yes (in my opinion, though some disagree). To be clear, I am not suggesting that ‘None of the Above’ be the correct answer, just that it be one of the choices. When ‘None of the Above’ is a choice the correct answer could be anything. It makes guessing more difficult.