You and your partner arrive at the scene of a fire at a large office complex. Witnesses tell you that they heard a loud explosion shortly before the building caught fire. You should:
A. take standard precautions and begin searching for critically injured patients.
B. tell the witnesses that you suspect that the explosion was the work of a terrorist.
C. ensure that your ambulance is parked upwind and uphill from the building.
D. carefully document the witnesses' statements and report them immediately.