What does unity of command mean?

Question

Question: What does unity of command mean?

Options:

1.  Responders receive assignments only from a superior within their home agency.
2.  Tactical direction is provided by the agency executive.
3.  There is only one Incident Commander per incident.
4.  Personnel report to only one ICS supervisor.

Answer 1

4. Personnel report to only one ICS supervisor

Unity of command mean personnel report to only one ICS supervisor.