Explanation
According to the PCI Card Production and Provisioning Physical Security Requirements, unsolicited visitors are defined as "individuals who do not have a pre-arranged appointment or a legitimate reason for visiting the Card Production Entity". The requirement for dealing with unsolicited visitors is that they must be registered, their identities confirmed, and must be allocated an escort before entry. The escort must accompany the unsolicited visitor at all times and ensure that they do not access any restricted areas or sensitive information.
The other options are not true statements about unsolicited visitors, as they may not comply with the PCI Card Production Standards or the best practices for physical security. References:
PCI Card Production and Provisioning Physical Security Requirements, Version 1.0, April 2019, page
101
PCI Card Production and Provisioning Physical Security Requirements, Version 1.0, April 2019, page
111