A nurse is reviewing discharge instructions with the caregiver of a 3-year-old child who underwent nephrectomy for Wilms' tumor. Which statement by the caregiver best demonstrates understanding of the necessary activity precautions to protect the child's remaining kidney?

A. "My child can participate in noncontact sports like swimming and rowing.": After nephrectomy, protecting the remaining kidney from trauma is essential. Noncontact activities such as swimming and rowing are appropriate because they promote physical activity while minimizing the risk of blunt abdominal injury. B. "I need to ensure my child avoids salty foods but there are no concerns about physical activity.": While moderate sodium intake supports kidney health, physical activity restrictions are necessary to prevent injury to the single remaining kidney. Ignoring activity precautions places the child at unnecessary risk. C. "Because my child has only one kidney, I will encourage increased physical activity to strengthen it.": Kidneys do not strengthen with increased physical activity. Excessive or unsafe activity can increase the risk of trauma to the remaining kidney rather than provide protection. D. "My child will be able to play boxing next year.": Boxing is a high-contact sport with significant risk of abdominal trauma. Participation in contact sports is generally discouraged for children with a single functioning kidney to prevent serious injury.