Noncombustible finishes affect sprinkler requirements by making some sprinklers unnecessary.

• A. Not needed if a noncombustible finish is present.
• B. Always required regardless of finish.
• C. Only required in basements.
• D. Not addressed in NFPA 13R.

Answer: (A)

Noncombustible finishes lower the fire load and slow how quickly a fire can grow. In NFPA 13R designs for low‑rise homes, that reduced hazard can mean some areas don’t need sprinklers at all or can have significantly reduced coverage, because the noncombustible surface won’t contribute fuel and helps limit flame spread. That’s why this option is the best answer: the presence of noncombustible finishes can make sprinklers unnecessary in certain spaces under the 13R provisions. The other statements don’t fit because sprinklers aren’t automatically required regardless of finish, NFPA 13R does address noncombustible finishes, and the allowance isn’t limited to basements.