The correct option is C Improving personal hygiene
Ringworm can be prevented by improving one's personal hygeine. Ringworm is a contagious fungal infection that affects the outer layer of the skin. It often spreads by direct, skin-to-skin contact with an infected person.
We do not have vaccines for fungal infections as most fungal infections affect the outer skin surface. Antibiotics are used to treat bacterial diseases and cannot be used to prevent the occurrence of a disease.