An eoc must retain the ability to perform its function even with reduced staffing. one of the best ways of ensuring this happens is

Cross train all EOC staff

Explanation:

An Emergency Operations Centre (EOC) is a facility set up in an organization to manage emergencies or disasters and ensure the organization continues to function in such periods.

An EOC must be able to carry out its functions even with reduced staffing. To ensure this happens, it must cross train all its staff, so they are versatile and can perform various roles or functions across the organization.

Option C.

Explanation:

Reserved powers, is the right answer.

The Tenth Amendment to the Constitution of the United States was approved on 15th December 1791. It denotes the policy of federalism and states' rights, which rigidly maintains the whole outline of the primary Constitution for the U.S. by asserting that the federal government holds only such authorities assigned to it by the U.S. Constitution. All left powers are reserved for the states or the residents.