Final answer:
The best hands-free solution for controlling server room access for Thomas is Proximity Cards, which offer convenient and efficient access without manual input.
Step-by-step explanation:
Thomas is looking for a hands-free solution to control physical access to the server room. The best choice for a hands-free access control method would be A) Proximity Cards. Proximity cards allow for quick and secure access to controlled areas without requiring the user to manually input a code or scan a fingerprint. Users can simply carry the card on their person, and the card reader can detect the card's presence when it is in proximity, unlocking the door. This method is non-intrusive and efficient, making it an ideal choice for busy environments where speed and convenience are paramount.