Final answer:
In the BSA Audit, room upgrades can be offered to Marriott Bonvoy members based on membership level and room availability, excluding Silver members.
Step-by-step explanation:
In the check-in BSA Audit, offering a 'room upgrade' during the process to Marriott Bonvoy members is based on their membership level and room availability. Gold, Platinum, Titanium, and Ambassadors members are usually eligible for room upgrades if they are available. However, it is not required to offer an upgrade to Silver members. The upgrade room can be considered as a surprise for the Elite members when they enter the room.