Because it starts with a common cold like fever coughing sneezing etc.
The highest priority in a multisystem trauma patient is D. Life threats that were identified during the general impression. Otherwise is would be your "ABC's". However, if there are immediate life threats, you won't need to worry about the basics if there are immediate life threats to manage.
You should never eat, store chemicals, lean on or sit on counters, leave dirty dishes/ utensils ect. Is this a multiple choice question? That would certainly help narrow down what the correct answer is. I just got my food handler's license and there's a lot of things it could be.