Read the following passage: 'During a structure fire, the incident commander must account for all personnel at regular intervals. This accountability is maintained using a passport system in which each firefighter's tag is tracked on an entry control board.' What is the PRIMARY purpose of the passport system described?
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A
To document firefighter certifications at the scene
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B
To track which firefighters have entered the structure
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C
To assign tasks to incoming personnel
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D
To record the time each unit arrived on scene