The nurse is caring for a child who is suspected to have Legg-Calvé-Perthes disease. The nurse should prepare the child for which of the following diagnostic procedures?

Rationale: A. MRI may be used in some cases but is not the primary diagnostic tool for Legg-Calvé-Perthes disease. B. Radiographs (X-rays) are the standard first-line imaging study to evaluate Legg-Calvé-Perthes disease by showing changes in the femoral head. C. Genetic testing is not relevant to diagnosing this condition. D. Bone biopsy is invasive and not indicated for diagnosing Legg-Calvé-Perthes disease.