A nurse is reinforcing dietary teaching with a client who has COPD. Which of the following instructions should the nurse include in the teaching.

The scenario involves providing dietary recommendations for a client with chronic obstructive pulmonary disease. Nurses must apply knowledge of metabolic demands and respiratory mechanics to optimize nutritional status, reduce dyspnea during meals, and prevent muscle wasting. Choice A rationale Large meals expand the stomach and push upward against the diaphragm, restricting lung expansion and increasing dyspnea. Clients should eat five to six small, frequent meals daily to minimize respiratory effort and fatigue. Choice B rationale Malnutrition and muscle wasting are common in severe respiratory disease due to increased work of breathing. A high-protein diet prevents lean muscle mass loss and strengthens respiratory muscles, which helps improve overall pulmonary function. Choice C rationale Fluids should be maintained at 2 to 3 L daily, unless contraindicated by heart failure, to liquefy thick pulmonary secretions. Liquefied secretions are easier to expectorate, which helps clear the airways and reduces dyspnea. Choice D rationale Hypermetabolism in respiratory disease increases daily caloric needs due to the high energy cost of breathing. Restricting calories leads to weight loss, diaphragmatic muscle wasting, and decreased functional capacity, worsening the disease prognosis.