Choice A rationale:

Intravenous antibiotics are used to treat bacterial meningitis, not viral meningitis. Viral meningitis is caused by viruses and does not respond to antibiotics.

Choice B rationale:

Antifungal drugs are used to treat fungal meningitis, not viral meningitis. Viral meningitis is caused by viruses, not fungi.

Choice C rationale:

Supportive care is the appropriate treatment for viral meningitis. Since viral meningitis is usually self-limiting and does not respond to specific antiviral medications, treatment focuses on managing symptoms and providing supportive measures to help the client recover.

Choice D rationale:

Prophylactic corticosteroids may be used in certain cases of bacterial meningitis to reduce inflammation and prevent complications, but they are not indicated for the treatment of viral meningitis.