A nurse is caring for a client who has end-stage kidney disease. The client's adult child asks the nurse about becoming a living kidney donor for their parent. Which of the following conditions in the child's medical history should the nurse identify as a contraindication to the procedure?

A. Incorrect – Osteoarthritis is a non-systemic condition that does not affect kidney function. B. Incorrect – Primary glaucoma is an eye disorder and does not interfere with kidney donation. C. Correct – Hypertension is a contraindication because kidney donation increases the remaining kidney's workload, increasing the risk of renal complications. D. Incorrect – Amputation does not directly affect kidney function, so it is not a contraindication.