Final answer:
The minimum uniformly distributed live load for habitable attics served with fixed stairs is 30 psf, according to the IRC, but local codes may vary.
The correct option is not given.
Step-by-step explanation:
The minimum uniformly distributed live load for habitable attics and attics served with fixed stairs is 30 pounds per square foot (psf).
This is specified in building codes such as the International Residential Code (IRC). However, it is important to check the latest local codes for any amendments or changes that may apply, as local codes can be more stringent than the standard IRC requirements.
The correct option is not given.