The answer is 30-40% mortality reduction in all cause mortality. This is done when engaged in moderate intensity of physical activity such as walking, sports, stair climbing which is done in a regular basis for at least an hour. This tells that there are benefits even in achieving only moderate intensity of physical activities.
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3034999/
I think the answer is (C) because it says " responsibility of public health" and in public u see nutrition education everywhere in public.
