Which two statements are true about VSAN deduplication and compression?

Which two statements are true about VSAN deduplication and compression? (Choose two.)
A. vSAN deduplication and compression are enabled on a per virtual machines basis.
B. vSAN deduplication and compression deduplicate with a variable block size.
C. vSAN deduplication and compression are enabled at the cluster level and occur at the disk group level.
D. vSAN deduplication and compression deduplicate with a fixed 4K-block size.