Calcium Potassium
Sodium Magnesium Phosphorus Chloride
The facility that is most cost-effective would be a local doctor at a primary health care center
The definition of hygiene says cleanliness. A does not have to do with that. B does because keeping that clean prevents food diseases like salmonella. C has nothing to do with hygiene. D has nothing to do with being clean. So the answer would be B. I hope this helps!
