The nurse is preparing a client for discharge who underwent a percutaneous nephrolithotomy with nephrostomy tube placement. Which instruction should the nurse include in the client's postoperative discharge teaching?

A. Pink-tinged hematuria is expected after the procedure, but reporting should be directed at increased bleeding or other signs of complications. B. While some activity restrictions are necessary, a complete restriction of all physical activities is generally not advised and can lead to other complications like blood clots or decreased mobility. C. An incentive spirometer is typically used to prevent respiratory complications post-surgery, but it is not specifically related to nephrolithotomy procedures. D. Monitoring the urinary output is crucial because decreased output can indicate a blockage or other complications related to the nephrostomy tube.