Which document specifies requirements for the backup functionality after a control center failure?

The correct answer is B, which refers to Standard EOP-008. This standard outlines requirements regarding the ability of the system operator to maintain the reliability of the grid in the event of a control center failure. EOP-008 mandates that entities have a backup functionality in place, ensuring that operations can continue smoothly and effectively during emergencies or failures.

This document details the necessary procedures and capabilities that operators must have to switch to backup systems seamlessly, which is crucial for maintaining system reliability and safety. It typically includes guidelines about equipment, personnel, and processes that must be in place to restore functions after a control center failure occurs.

Other options, such as System Performance Metrics, the Operating License Agreement, and the Backup Functionality Design Document, while possibly relevant to operational processes, do not specifically address the requirements for backup functionalities in the manner that EOP-008 mandates. These documents might contain general performance evaluations or regulatory agreements but lack the specific requirements and protocols to manage control center failures that are critical for system operations.