An analyst needs to know what data an organization possesses. Which of the following is the best document for the analyst to consult?

A data destruction policy outlines how and when data should be securely deleted, not what data exists.

A data use document (or policy) specifies how data can be utilized, shared, and protected, but it doesn't inventory the data itself.

A data dictionary is a centralized repository of information about data, including data types, sizes, descriptions, relationships to other data, and data sources. It essentially defines the structure and meaning of all data elements within an organization's systems, making it the definitive guide to understanding what data is available.

A data retention policy defines how long specific types of data must be kept, not what data is currently collected or its characteristics.