Because when your body is under anesthetic your body’s reflexes are temporarily stopped so if there is food or liquids in your stomach there is a chance you might throw up
The answer you are looking for is D.) Distress.
Distress is the bad stress that wont benefit you or your psyche, Distress is often cause by an fear or a discomfort in a situation that can be related to safety issues or anxiety.
What are the rest of the answer choices?