11. Emergency Support Functions (ESFs): A. Are appropriate only for Stafford Act incidents. B. Must be used by local jurisdictions as their primary coordinating structure. C. May be selectively activated to support response activities. D. Are always activated in incidents requiring Federal support.

C. May be selectively activated to support response activities.

Explanation:

The Emergency supported Functions is the groping of the governmental and certain private-sector capabilities into an organization and support the resources and program implementation and services and that are most likely need to save lives and protect property and the environment and restoration of the essential services.

C; skin, is the answer!