Exercising civil authority, maintaining the safety and well-being of the general populace, and sustaining the industrial and economic base during an emergency are examples of: a. National primary functions
b. Optional Functions
c. Essential functions
d. Persistent requests

c. Essential functions

Explanation:

Essential Function which is sometimes referred to as Mission Essential Function is a term that describes the types of functions that allow an organization to deliver vital services, maintain civil authority, pursue defense and well-being of the general populace, and at the same time sustain industrial and economic source in the time of an emergency.

Hence, the right answer is option C: Essential Function.

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