You are answering a USMLE-style medical question. Question: A 3-year-old girl is brought to the emergency department by her parents for an acute arm injury. The mother reports that they were walking in the park and the patient’s dad was swinging the patient in the air by her arms. The dad reports he then heard a click and the patient immediately began to cry. On examination, the patient is holding her right forearm in a pronated position and her elbow slightly flexed. Pain is localized to the lateral aspect of the elbow. She refuses to use the affected limb. She does allow passive flexion and extension with full range of motion but supination is limited and causes pain. Which of the following is the next step in management? Options: A) Immobilization B) Moderate flexion then hyperpronation C) Radiograph D) Supination then maximal extension Reply with ONLY the letter of the correct answer (A, B, C, or D). No explanation.