In ServiceNow CMDB governance, the CI Class Manager allows administrators to assign ownership and accountability at the class level. This ownership is used by governance tools—especially CMDB Data Manager—to automatically determine who receives tasks and actions related to data lifecycle management.

The group reference field that aligns with class ownership and is consumed by CMDB Data Manager policies is the Managed By Group. This field represents the team responsible for the technical stewardship and lifecycle management of CIs within that class.

When CMDB Data Manager executes policies such as retention, archival, or cleanup, it uses the Managed By Group to assign tasks to the appropriate data owners. This ensures governance actions are routed to the correct accountable team without manual intervention.

Approval Group, Support Group, and Change Group serve different purposes. Approval Group is used for workflow approvals, Support Group is used for operational ticket routing, and Change Group supports Change Management governance. None of these reflect data ownership at the class level.

Therefore, to leverage CI class ownership defined in the CI Class Manager within CMDB Data Manager policies, the correct field is Managed By Group, making Option B the verified answer.