Northern Trail Outfitters has several business units (BUs) used to segment geopolitical regions.

Shared Data Extensions, created at the parent/top-level Business Unit and configured to be visible to child Business Units, are the platform ' s native mechanism for maintaining a single, centrally-managed copy of data — such as product catalogs and support information — that is genuinely identical and consistent across every regional BU, eliminating the redundancy and synchronization risk of maintaining separate regional copies. Because the data is shared by reference from a single source rather than duplicated, any update to product or support information only needs to be made once at the parent level to be immediately reflected everywhere it ' s used, which is both the most efficient and most maintainable configuration for consistent, non-region-specific reference data. Option B, maintaining regional-specific duplicate copies, directly contradicts the requirement that the data ' is consistent across all regions ' and introduces ongoing synchronization overhead and risk of the copies drifting out of alignment over time. Option C, provisioning broad Data Manager Roles for cross-BU visibility, addresses user permissions and access rather than the actual data architecture and storage efficiency question being asked. Option D references a nonstandard, fabricated ' CustomObjectData API ' mechanism that is not a documented Marketing Cloud feature for this purpose. Reference: Shared Data Extensions, Business Unit Data Architecture.