Which intervention should the nurse include in a long-term plan of care for a client with chronic obstructive pulmonary disease (COPD)?

A. Limiting fluid intake is incorrect; adequate hydration helps thin mucus secretions, making them easier to clear. B. Reducing risk factors for infection is correct because respiratory infections can exacerbate COPD, increase hospitalizations, and worsen long-term outcomes. Preventive measures include vaccinations, hand hygiene, and avoiding exposure to irritants. C. Diaphragmatic breathing is beneficial, but it is a short-term self-management technique, not the main focus of a long-term care plan. D. Administering high-flow oxygen during sleep can be dangerous for COPD clients, as excessive oxygen may reduce their respiratory drive and cause CO₂ retention.