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.
Answer:
She needs to know to wear some gloves so she doesn't get any of the cleansers on her hands and she needs to wear a face mask so she doesn't breathe in any of the chemicals from the cleansers.
I think it may be B. Climax
D. parents getting a divorce