During a home inspection, the inspector observes that wood structural members in the crawl space show evidence of wood-boring beetle activity. Which sign BEST distinguishes active infestation from old, inactive damage?
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A
Fresh, powdery frass and clean exit holes indicate active beetles
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B
Any exit holes in lumber indicate an active infestation
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C
Darkened exit holes always mean the infestation is currently active
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D
Beetle damage is always active unless chemically treated