Chain of Command / Unity of Command means:

• A. Multiple supervisors can assign tasks
• B. Every unit has its own chain of command
• C. Assignments can be made by any supervisor
• D. Single supervisor; assignments only from ICS supervisor

Answer: (D)

In this concept, two ideas work together: a clear line of authority from top to bottom (chain of command) and a rule that each person reports to only one supervisor (unity of command). When both are in place, every assignment comes from one designated supervisor who is part of the overall incident command structure, which keeps directions consistent and accountability clear. The statement that matches this is that there is a single supervisor and assignments come only from the ICS supervisor. Having multiple people giving orders or any supervisor being able to assign tasks would create conflicting directions and blur responsibility, which is exactly what unity of command and a single chain of command are designed to prevent.