Which of the following is a valid form of identification for visiting inmates?

A passport is a valid form of identification for visiting inmates because it is a government-issued document that verifies an individual's identity and citizenship. Correctional facilities typically require visitors to present valid and recognizable forms of ID, and a passport meets these criteria by providing both a photograph and personal information such as name and date of birth.

In contrast, a student ID is often not considered a reliable form of identification because it may not have stringent verification processes or universally recognized authority. A company employee ID, while potentially valid, is not typically accepted unless the correctional facility has specific guidelines permitting it, as it may lack the necessary government backing or security features found in a passport. A private investigator badge is also unlikely to be accepted, as it does not serve as a standardized form of identification for the general public and may not meet the facility's criteria for visitation. This reinforces the need for official government identification, like a passport, when visiting inmates.