Explanation
The best option to enable the capability of an organization to sustain the delivery of products and services within acceptable time frames and at predefined capacity during a disruption is B. Business continuity plan (BCP). This is because a BCP is a documented collection of procedures and information that guides the organization to prepare for, respond to, and recover from a disruption, such as a natural disaster, a cyberattack, or a pandemic. A BCP aims to ensure the continuity of the critical business functions and processes that support the delivery of products and services to the customers and stakeholders. A BCP also defines the roles, responsibilities, resources, and actions required to maintain the operational resilience of the organization in the face of a disruption.
References = CISM Review Manual 15th Edition, Chapter 4, Section 4.2.3, page 2141; CISM Review Questions, Answers & Explanations Manual 9th Edition, Question 6, page 3