Choice A rationale:

Administering antipyretics helps to reduce fever, but it does not specifically prevent the spread of meningitis. It addresses a symptom but does not target the transmission of the disease.

Choice B rationale:

Elevating the head of the bed is beneficial for clients with increased intracranial pressure, not for preventing the spread of meningitis.

Choice C rationale:

Providing comfort measures can improve the client's well-being, but it does not directly address the prevention of meningitis transmission.

Choice D rationale:

Practicing good hygiene habits, such as regular handwashing, can help prevent the spread of meningitis. Since meningitis can be transmitted through respiratory secretions, practicing good hygiene is essential in reducing the risk of infection transmission.