Environmental

In Montana, 'indoor air quality' concerns in commercial buildings may include all of the following EXCEPT:

ARadon seeping from the soil
BCarbon monoxide from combustion appliances
CBeneficial oxygen-enriched air from HVAC upgrades✓ Correct
DVOCs (volatile organic compounds) from building materials and furnishings

Explanation

Indoor air quality concerns include radon, carbon monoxide, VOCs, mold, asbestos fibers, and other pollutants. Oxygen-enriched air from HVAC upgrades is not typically an indoor air quality concern in the same category as pollutants.

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