Answer:
A. Mandates that the private-sector entities responsible for critical infrastructure and key resources develop and exercise contingency plans.
Step-by-step explanation:
The United States National Response Framework is a comprehensive guide that provides solutions and help on how to prevent, protect, reply and recover any problems that may arise from any disaster. It is basically a guide on how the nation replies to any disaster that strikes, at any time. Built upon a scalable, flexible and adaptable coordinating structures, it aligns the key roles and responsibilities of the various sectors at times of disasters. It also mandates that the private-sector entities responsible for critical infrastructure and key resources develop and exercise contingency plans.