正解:A
Explanation
The primary objective of timely declaration of a disaster is to ensure the continuity of the organization's essential services, as it enables the activation of the business continuity plan (BCP) and the disaster recovery plan (DRP) that outline the processes and procedures to maintain or resume the critical business functions and minimize the impact of the disruption. A timely declaration of a disaster also helps to communicate the situation to the stakeholders, mobilize the resources, and request external assistance if needed.
References = CISM Review Manual, 27th Edition, Chapter 4, Section 4.3.1, page 2271; FEMA, How a Disaster Gets Declared2; CISM Online Review Course, Module 4, Lesson 3, Topic 13