Under NFPA 25, what is an 'impairment' in the context of a fire protection system?
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A
A situation where the system is older than 10 years and may need replacement
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B
A condition where part or all of a fire protection system is taken out of service, reducing its effectiveness
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C
A minor deficiency noted during annual inspection that does not affect system operation
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D
A situation where the system activates accidentally without a fire