A nurse is reinforcing teaching with a client who has a new diagnosis of COPD. Which of the following statements by the client indicates an understanding of the teaching?

Rationale: A. "I should do aerobic exercises once per day.": While exercise is beneficial for clients with COPD, it should be individualized and not necessarily done daily, especially in the beginning. Overexertion can worsen symptoms, so gradual and well-monitored activity is recommended. B. "I will increase my fluid intake to 1,700 milliliters per day.": Clients with COPD are typically encouraged to consume 2,000 to 2,500 mL of fluids daily unless contraindicated. Higher fluid intake helps thin secretions, making them easier to expectorate and improving airway clearance. C. "I should practice pursed-lip breathing exercises.": Pursed-lip breathing improves ventilation by keeping airways open longer during exhalation, reducing air trapping and dyspnea. It is a fundamental breathing technique taught to clients with COPD to improve oxygenation and control shortness of breath. D. "I will consume low-protein, low-calorie foods.": Clients with COPD often have increased energy demands due to the work of breathing. A high-protein, high-calorie diet is typically recommended to prevent muscle wasting and support respiratory muscle strength.