A. ESFs are exclusively a state coordinating mechanism
B. ESFs are not exclusively federal coordinating mechanism
C. ESFs are only a state or local coordinating mechanism
D. ESFs are exclusively a federal coordinating mechanism
D. The Emergency Support Functions (ESF) are exclusively a federal coordinating mechanism.
The Emergency Support Functions refers to groups of sector which form the organizational structure that provide support, resources and services that are needed to save lives, protect property and the environment.
The support function is a structure used by Federal inter-agency support for a response to an incident.
Therefore, the statement that the "Emergency support function (ESF) are exclusively a federal coordinating mechanism" is correct.