The nurse formulates a nursing diagnosis of Activity intolerance related to inadequate oxygenation and dyspnea for a client with chronic bronchitis. To minimize this problem, the nurse instructs the client to avoid conditions that increase oxygen demands such as the following（）
A. drinking more than 1,500 mL of fluid daily.
B. eating a high-protein snack at bedtime.
C. eating more than three large meals per day.
D. being overweight.