Which of the following best describes an authoritative source?

An authoritative source is best described as a system of record for identity data, meaning it is considered the primary source of truth for that data. This system maintains accurate and comprehensive information about identities, such as user accounts, entitlements, and attributes, and is responsible for managing changes to that data over time. In identity governance, having a designated authoritative source helps organizations ensure data integrity and compliance, enabling more effective identity management and access control.

This definition encompasses the fundamental role of authoritative sources within identity management frameworks, as they serve as the basis for identity verification and access policies. While the other options might contain relevant data, they do not represent the complete functionality and significance of being an authoritative source for identity data. For instance, while a system that contains account and entitlement data may offer critical insights, it lacks the overarching authority inherent to a system of record.