The map above shows changing boundaries of the Roman Empire between 395 AD and 476 AD. Which of the following statements best explains the changes that the map is showing?

Aguiding principle of the national response framework is that: a. response partners use nonstandard structures to allow for flexible and scalable responses. b. unity of effort results when responding agencies are willing to relinquish their authorities. c. effective partnership relies on engaging all elements of the whole community. d. readiness to act encourages response partners to self-dispatch to an incident scene.