A training manual states: 'A backdraft is indicated by: hot door, pulsating smoke, yellowish-brown smoke, and no visible flame.' A firefighter finds a hot door and yellowish-brown smoke at a door on the second floor. What should they do based on the manual?
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A
Open the door immediately to release the built-up pressure
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B
Do not open the door — backdraft indicators are present; ventilate from the top before entry
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C
Cool the door with water from outside and then open it
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D
Force entry using a Halligan bar to rapidly breach the door