Environmental

Asbestos-containing materials are most dangerous when they are:

AEncapsulated and undisturbed
BFriable (easily crumbled) and releasing fibers into the air✓ Correct
CSealed behind drywall
DLocated in exterior siding

Explanation

Asbestos is most hazardous when it is friable — meaning it can be easily crumbled or disturbed, releasing microscopic fibers into the air that can be inhaled. Asbestos that is in good condition and undisturbed (encapsulated) is generally not an immediate health risk.

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