Ann is the IS manager for several new systems in which the classification of the systems' data are being decided. She is trying to determine the sensitivity level of the data being processed. Which…

A data steward is primarily responsible for data quality, metadata, and defining business rules, ensuring the data is accurate and consistent, but does not typically determine its initial classification or overall sensitivity level.

A data custodian (or data processor) is responsible for the technical implementation and maintenance of controls to protect the data, such as backups and access management, acting on behalf of the owner, but does not decide the data's classification.

A user interacts with the data, creating or consuming it as part of their job function, and is bound by established data classification policies but is not responsible for defining those classifications.

The data owner is the individual, often a senior manager or business unit head, who bears the ultimate responsibility for the data throughout its lifecycle, including determining its business value, criticality, and sensitivity. This role has the authority and business context required to establish the appropriate classification level for the data being processed, which dictates its protection requirements.