A 40-year-old man complains of pain to his left shoulder after falling on his outstretched arm. He is in significant pain and refuses to move his arm, which he is holding about 6" (15 cm) away from his chest. Responding paramedics are approximately 10 minutes away from the scene. After checking distal sensation and circulation, you should:

A. Place a pillow or rolled towel between his arm and chest.
B. Apply a sling and swathe and recheck distal circulation.
C. Carefully and slowly move his arm against the side of his chest.
D. Wait for the paramedics to arrive and give him pain medication.