D: heart rate
PCRABS is a good acronym to remember the skill related fitness components
Power. Co ordination. Reaction time. Agility. Balence. Speed
A RN Nurse would be better and quicker and a good start. Many schools are forwarding that position and beginning to make classes about it, as the nurse job is the future.
That's my opinion, take it from a Fire Fighter and soon to be EMT.
Adult and grown that is the correct answer