An office receptionist discovers a visitor's forgotten confidential folder on a lobby table after the visitor has departed. What is the most appropriate action to take?

The correct option is Turn it over immediately to the office manager or security supervisor.

Explanation:
When a confidential folder or sensitive material is left behind in a public or common lobby area, protecting privacy and following workplace protocols are paramount.

1. Why turning it over to management/security is correct:
Office managers and security supervisors are authorized personnel who possess secure storage facilities and established protocols to log lost items and safely contact the owner without exposing confidential contents to unauthorized individuals.

2. Why other options are inappropriate:
- Keep the folder for personal reference: This is unethical and constitutes a direct breach of privacy and confidentiality rules.
- Ask other waiting visitors if it belongs to them: Inquiring about or handling sensitive documents in front of unauthorized third parties risks privacy violations.
- Leave it on the table and ignore it: Leaving confidential data unattended in a lobby exposes it to potential theft or unauthorized access.