You have arrived on the scene where a tractor trailer has overturned. As you pull onto the scene, the driver of the truck approaches and informs you that he is hauling radioactive medical wastes and warns you that there is a car underneath the overturned trailer. Which one of the following should you do immediately?

A) Attempt to identify the material and type of rays being emitted.
B) Determine if any radioactive material has been released.
C) Position the ambulance in front of the vehicle to block oncoming traffic.
D) Move the ambulance upwind of the scene.

Answer: D