Which Dell EMC Unity component holds the contents of write cache upon the loss of AC power?

A.
M.2 SSD drive

B.
SP memory

C.
Vault disk 0

D.
Vault disks 0_3

Explanation:
Reference: https://www.emc.com/collateral/white-papers/h15084-dell-emc-unity-introduction-to-the-platform.pdf
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