Hahn's Law
If you see ‘all of the above,’ you pick it. It’s like a math problem gave you the answer for free.
She saw the question and just picked ‘all of the above’ because she was tired.
He didn’t even know what the question was asking. He just picked ‘all of the above.’
The test was 20 questions. He picked ‘all of the above’ for 18 of them.