I imagine the answer would be "injuries to other drivers", since this is the community so to speak.
Answer: D. subjective discomfort
Explanation:
Subjective discomfort is when a person experiences displeasure and is unable to cope with certain scenarios or thoughts to the point where the displeasure can even manifest physically and take a toll on the body not unlike what Katherine experiences whenever she is about to leave her apartment.
Aerobic energy comes from the burning of carbohydrates.