The national response framework is:
a. written exclusively for professional emergency management practitioners.
b. triggered following a declaration by the secretary of homeland security.
c. always in effect, and elements can be implemented as needed on a flexible, scalable basis to improve response.
d. a comprehensive guide to prevention, protection, response, recovery, and mitigation.

Option (C) is correct.

Explanation:

National Response Framework also known as the NRF is referred to as a guide in order to know how the State usually responds to several kinds of disasters and calamities. It is thoroughly built on a flexible, scalable and adaptable concept which are further identified under the National Incident Management System in order to align key roles.

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answer; the above statement is (true);