The emergency operations plan is a key component of an emergency management program that:
a. provides standard operating procedures for responding to specific types of incidents.
b. serves primarily as a budgeting document for acquiring emergency management resources.
c. establishes the overall authority, roles, and functions performed during incidents
d. is required in order for a jurisdiction to receive federal assistance with mitigation initiatives

Taking into account the statement above:

"The emergency operations plan is a key component of an emergency management program that:

a. Provides standard operating procedures for responding to specific types of incidents.

b. Serves primarily as a budgeting document for acquiring emergency management resources.

c. Establishes the overall authority, roles, and functions performed during incidents

d. Is required in order for a jurisdiction to receive Federal assistance with mitigation initiatives"

The answer about that the emergency operations plan is a key component of an emergency management program is option: C. Establishes the overall authority, roles, and functions performed during incidents," because this can be applied to a wide variety of scenarios. 

Hope this helps.