Plastic. It’s easier to clean and does not have many places for it to hide unlike wood.
6 is two breaths because for every thirty pumps you do in CPR you do two breaths. 11 is CPR as CPR is done to pump oxygen into thr brain so that when the AED comes, there is not brain damage, as the brain would be damaged if it does not have enough oxygen.
B is correct because I have learned Psychology relating to this
your answer is C. Peripheral nervous system (PNS)