Final answer:
Gas water heaters are not allowed in laundry rooms open to the living area. All other locations mentioned are acceptable.
Step-by-step explanation:
Gas water heaters are allowed in all of the following locations except:
- Basements accessible only from interior stairs
- Attics accessible only from a permanent ladder
- Storage closets
- Laundry rooms open to the living area
The question is referring to the locations where gas water heaters are not allowed. In this case, gas water heaters are not allowed in laundry rooms open to the living area. All other options, including basements accessible only from interior stairs, attics accessible only from a permanent ladder, and storage closets, are acceptable locations for gas water heaters.