Which of the following is a key requirement for fire safety in multi-story buildings

Which of the following is a key requirement for fire safety in multi-story buildings

Which of the following is a key requirement for fire safety in multi-story buildings?

A. Non-combustible exterior walls

B. Automatic sprinkler systems on all floors

C. Fire doors in stairwells

D. All of the above

Answer: D

Explanation: All three are mandatory fire safety requirements.