Question: An older adult presents for an annual physical. They're retired and maintain an active lifestyle with exercise 3-5 times per week. The patient eats well-balanced meals and avoids excess salt. They have well-controlled hypertension and are pre-diabetic. Which of the following is an age-related change in patients of this age group? A. Increased CrCl B. Increased total body water C. Increased perception of thirst D. Increased adipose tissue