The incudent command systemThe Incident Command System $($ICS$)$ is:

A$.$ A relatively new approach created based on the lessons learned from the $9/11$ terrorist attacks.

B$.$ A standardized approach to incident management that is applicable for use in all hazards.

C$.$ A military system used in domestic incidents to ensure command and control of Federal resources.

D$.$ Most applicable to the management of complex incidents that extend over many hours or days.