None are correct. The driver's delta V will also be 5 mph. The driver's delta V will be about 2.5 times that of his vehicle. The driver's head acceleration will be about the same as the vehicle's. The driver's head acceleration and delta V will likely be higher than that of the vehicle.
None are correct.
Age under 10 years. History of scleroderma. None are correct. The anterior longitudinal ligament. The posterior ligamentous complex.