Environmental

Asbestos-containing materials (ACM) in a home built before 1978 are most dangerous when they are:

AIntact and undisturbed
BEncapsulated
CFriable (crumbling) and releasing fibers into the air✓ Correct
DLocated in exterior siding

Explanation

Friable (easily crumbled) ACM releases asbestos fibers into the air, creating a health hazard. Intact, undisturbed asbestos is generally considered less immediately dangerous.

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