Notification system for lift operation status.

• A. Audio-Visual Alert
• B. Safety Features
• C. Periodic Testing
• D. Maintenance

Answer: (A)

Communicating lift operation status to passengers requires a signal that is immediate and easy to understand. An Audio-Visual Alert provides both sound and light cues to indicate what the lift is doing—moving, stopping, doors opening, or ready to depart—so people in different situations can quickly know the current state. This dual modality helps ensure everyone, including those with hearing or vision limitations, can respond appropriately and safely.

Other options describe protections or routines rather than a real-time status cue: safety features are general protections, periodic testing covers verification of function, and maintenance deals with keeping the system in good condition. They don’t actively notify occupants of the lift’s status as effectively as an audio-visual alert.