In a three-collision motor vehicle crash, which statement best describes the typical pattern of injuries and their severity?

• A. Two collisions; second collision is most life-threatening
• B. Four collisions; third collision is most life-threatening
• C. Three collisions; first collision is most life-threatening
• D. Three collisions; third collision is most life-threatening

Answer: (D)

In a three-collision crash, the injuries come in three stages: the car hitting an object, the occupant colliding with the interior of the vehicle, and then the internal organs colliding within the body due to deceleration. The most dangerous injuries usually occur during that third collision, when internal organs can be crushed, torn, or sheared under rapid deceleration. This is where life-threatening conditions like internal bleeding or brain injury can develop, sometimes not immediately apparent but capable of rapid deterioration.

So the best description is that there are three collisions, and the third collision is the most life-threatening. The other options are less accurate because the typical pattern is three collisions (not two or four), and it is the third collision, not the first, that tends to carry the greatest risk to life due to internal organ injury.