Answer:
It D thank you that person that gave the the answer God bless you if you want to make sure it D
Explanation:
I think the circulatory system is the best body system because we need the heart to stay alive, many people live with only one lung. but we need the respiratory system to let oxygen in, and let carbon dioxide out.
This authority along with others could be HIPPA
The answer would be abstinence because you’re abstaining from doing.... it
