VCP题目解惑

Z沁心

各位领导，想请教一下2v0-622题库里有条题目的疑惑：
When upgrading a VMware vSAN cluster to version 6.5, which two tasks must be completed to comply with upgrade requirements and VMware-recommended best practices? (Choose two.)
A. Use RVC to upgrade the hosts.
B. Use the latest available ESXi version.
C. Back up all VMs.
D. Use only the “Full data migration” maintenance mode option.

题库答案是B.C，但是通过查了官方的文档，感觉应该选择A.B

请帮忙确定一下

smartwolf

rvc is option for upgrade disk

Z沁心

thanks

smartwolf

Upgrade the vSAN disk format. Upgrading the disk format is optional, but for best results, upgrade the objects to use the latest version. The on-disk format exposes your environment to the complete
feature set of vSAN

tib

謝謝這個討論與答案，我原本也跟樓主的想法一樣...
沒搞清楚must與option的差異