I believe c is the correct answer.
Yes
(explanation: i really just needed to answer a question, so thank you)
Setting a balance of how much you would be eating would be a way that you could prevent a disorder of eating. Setting limits to how much you would be eating, and also, with this in mind, having some stand, and self control would also be a way to prevent eating disorder.
Paranoia, hallucinations, talking nonsense words, delusions.
This questions is quite open, so options are endless.