A high-pressure alarm sounds from the cargo pump room's fixed gas detection system, indicating a significant hydrocarbon leak. What is the most critical initial action for the watch officer to take?
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A
Send an assistant to the pump room to visually confirm the leak.
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B
Trip the emergency stop for all cargo pumps and shut down relevant valves.
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C
Immediately activate the general alarm and muster the crew.
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D
Start the pump room's ventilation system at maximum speed.