If you are the first unit to arrive at a scene and observe any signs suggesting that a hazardous materials incident has occurred, you should:

A) place yellow or red police tape around the danger zone and begin moving bystanders away from the scene.
B) remain upwind from the scene if possible and immediately call the hazardous materials response team.
C) don gloves, a mask, and a gown and begin moving injured patients away from the area surrounding the incident.
D) immediately move any patients to a designated area and begin decontaminating them by dousing them with water.

Answer: B) remain upwind from the scene if possible and immediately call the hazardous materials response team.