Final answer:
The statement is true; for hygiene and professional service standards, servers should carry flatware on a tray or plate to prevent cross-contamination and maintain sanitation.
Step-by-step explanation:
The statement Preferably, flatware should be carried on a tray or plate, not in a server's hands is True. Cross-contamination can occur when bare hands come into direct contact with food utensils that will be used by guests.
Therefore, for hygiene and professional service standards, it is best practice in the hospitality industry to use a tray or plate for carrying flatware. This method ensures that a server can deliver flatware to the table efficiently while maintaining sanitation.