Flashover is the stage of a fire at which all surfaces and objects within a space have been heated to their ignition temperature and flame breaks out almost at once.

• A. Stage of a fire at which all surfaces and objects within a space have been heated to their ignition temperature and flame breaks out almost at once
• B. A delayed ignition in a closed room
• C. The cooling of surfaces before exiting
• D. The venting of smoke from a room

Answer: (A)