You Are the First to Arrive on the Scene of a Fire

You are the first to arrive on the scene of a fire at a farm. By the time you arrive, the fire has reached a storehouse, and the owner says he keeps "a whole bunch of chemicals in there." You should first

A) visually inspect the storehouse to identify the possible hazardous materials.
B) inform dispatch that you suspect the involvement of hazardous materials.
C) concentrate on containing the fire to prevent it from spreading to other buildings.
D) ask the owner for the material safety data sheets of the chemicals.