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?

A. “I should practice pursed-lip breathing exercises.": This technique involves inhaling through the nose and exhaling slowly through pursed lips (as if whistling). This creates back-pressure in the airways, which keeps the bronchioles open longer during exhalation. This helps the client remove trapped carbon dioxide (CO2), reduces shortness of breath, and promotes relaxation. B. "I will consume low-protein, low-calorie foods": Clients with COPD require adequate protein and calories to maintain muscle mass and energy for breathing. Restricting protein and calories could worsen muscle wasting and fatigue. C. “I should do aerobic exercises once per day": While regular physical activity is beneficial, exercise should be paced and tailored to the client’s tolerance. Overexertion can exacerbate dyspnea and fatigue in COPD clients. D. "I will increase my fluid intake to 1,700 milliliters per day.": While hydration is important to thin secretions, 1,700 mL is on the lower end of standard daily requirements for an adult. Clients with COPD are encouraged to drink 2 to 3 liters (2,000 to 3,000 mL) of fluid per day (unless contraindicated by heart failure) to help liquefy thick mucus, making it easier to cough up.