A GSI is running a qualification course and a student's firearm locks open after the last round. What does this indicate about the firearm's condition?
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A
The firearm has malfunctioned and requires immediate repair
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B
The magazine is empty and the slide or bolt has locked back — the firearm is empty
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C
The extractor has failed and the case is stuck in the chamber
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D
The recoil spring is broken and the slide cannot return to battery