You are the first unit to arrive on the scene where a car has driven off the street and into a large office building. As you approach the car, you see that there are two victims unresponsive in the front seat. In the back seat you notice a very large gas$-$type tank. You see the car as been modified to hold this large tank that fills up the back seat area. What inference can you make from assessing this scene?The vehicle's driver must be intoxicated.This could be an explosion$-$type terrorist event.The car's driver may be trying to expose others to a gas.The victims may have been exposed to some type of gas.