I would say E as it has to do with nutrition and dietetics and they would be registered.
Viral, bacterial, fungal, communicable? I know three not sure on the fourth one sorry
I'd say B. Immune suppression.
I'm pretty sure it's Waterborne Diseases.
Waterborne Diseases are caused by Pathogenic Microorganisms that most commonly are transmitted in contamination in Fresh Water.
I hope that helped.. •ᴗ•
Finna have a nice And juicy Von Burger