7-year-old male with sudden scrotal pain reports to the Emergency department with his parent. Exhibits A Nurse is caring for a 7-year-old child with sudden onset of testicular pain. The nurse is aware that the pain may be a testicular torsion and assesses for what?

A. A negative Prehn's sign (where lifting the scrotum does not relieve pain) is a key sign of testicular torsion, indicating that the blood flow to the testicle is compromised. B. Rebound abdominal tenderness suggests peritoneal irritation, not specifically testicular torsion. C. Kernig's sign is a sign of meningitis, not related to testicular torsion. D. A round, smooth, non-tender mass in the scrotum is more consistent with a hydrocele or hernia, not testicular torsion.