A nurse arrives at the scene of a motor vehicle collision, and finds that the male driver is sitting in the car screaming about severe knee pain. He is alert and oriented, but his knee is crushed into the dashboard. A bystander reports that a 911 call has been made and help is on the way. What intervention should the nurse implement? A. Place a rolled pillow behind the driver's neck to stabilize the spinal cord. B. Carefully assist the driver out of the car to assess and treat the injury. C. Tell the driver to try to see if he can move his toes on the affected leg. D. Instruct the driver to stay in the car and try not to move unnecessarily.