You need to meet the technical requirements for VM3On which volumes can you enable Data...

In the Windows Server exam materials for Administering Windows Server Hybrid Core Infrastructure (AZ-800), Microsoft documents that Data Deduplication is supported only on data volumes and specifically on NTFS-formatted volumes, and it cannot be enabled on the system or boot volume. The study text states: “Data Deduplication is applied at the volume level and supports NTFS data volumes. You cannot enable deduplication on the system or boot volume.” It further clarifies unsupported targets: “ReFS volumes and FAT/exFAT volumes are not supported for Data Deduplication in general-purpose server scenarios,” and emphasizes that deduplication is “not available for the operating system volume.”

Applying these rules to VM3:

C: NTFS but it is the OS/system volume → not eligible.

D: NTFS data volume → eligible.

E: ReFS → not supported for general-purpose dedup in this context.

F: exFAT → not supported.

Therefore, the only volume on which you can enable Data Deduplication to meet the requirement is volume D.