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) Amputation does not automatically disqualify someone from being a kidney donor, as the donor's overall health and kidney function are the primary concerns. B) Osteoarthritis is not a contraindication for kidney donation, as this condition generally does not affect kidney function or the ability to undergo surgery. C) Primary glaucoma is an eye condition that does not typically impact the decision to donate a kidney. The focus is primarily on the donor's renal function and overall health. D) Hypertension can be a significant contraindication for kidney donation, especially if it is poorly controlled. Elevated blood pressure can increase the risk of complications during and after surgery and may affect the donor's long-term health, as they would have only one kidney. Therefore, this condition should be carefully evaluated before considering kidney donation.