A nurse is providing preoperative teaching to a client about promoting circulation during the postoperative period. Which of the following instructions should the nurse include?

The correct answer is A: Participate in range-of-motion exercises. Range-of-motion exercises help promote circulation by improving blood flow to the extremities, preventing blood clots, and reducing the risk of complications such as deep vein thrombosis. These exercises also help maintain joint flexibility and muscle strength. Placing a pillow under the knees (B) can help with comfort and circulation, but it is not as effective as active range-of-motion exercises. Remaining on bed rest (C) for 24 hours can actually increase the risk of circulation problems. Using an incentive spirometer (D) every 4 hours is important for preventing respiratory complications but does not directly promote circulation in the extremities.