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During a cargo fire, opening the trailer doors may actually cause the fire to expand because doing so:
A.  Allows oxygen into the trailer.
B.  Changes the temperature of the trailer.
C.  Provides more moisture to the trailer.
When experiencing a cargo fire, it may be a bad idea to open the doors to the trailer. Doing so allows oxygen to enter the area, potentially causing the fire to flare up and expand.
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