Business - Visits & Meetings in the NISP

What is required if a cleared employee from another company comes to your facility to repair a piece of equipment and it is not possible to implement adequate measures to prevent the visitor from gaining knowledge of classified information?

a.)The FSO may consider escorting the visitor to the classified area.

b.)The visit must be handled as a classified visit and all requirements in the NISP must be met.

c.)The FSO must accompany the visitor throughout the stay.

d.)The visitor must sign in and wear a visitor badge.