17. the unified coordination group: a. directs the incident command structure established at the incident. b. is a temporary federal facility. c. provides coordination leadership at the joint field office. d. is a state-level group comprised of the heads of each emergency support function (esf).

C. Provides coordination leadership at the Joint Field Office.                      

Explanation:

        The Unified Coordination Group is an organization of the Incident Command System of the United States.  The Unified Coordination Group has a leadership and a responsibility to manage and control the incident coordinating with the other groups.

        The organization provides for the coordination leadership at Joint Field Office. It also provides strategic coordination and promotes collaboration to resolve any conflicts that may arise within the Federal interagency.

Hence the correct option is (C).