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When DES arrives at the scene, all personnel must remain calm, follow DES instructions and?
A. Keep in mind that DES will not treat the injured or begin evacuation until the threat has been neutralized.
B. Keep hands visible at all times and avoid making quick movements towards the DES personnel.
C. Avoid pointing, screaming, yelling, or any action that may be misunderstood by DES as hostile.
D. All of the above.