What is used by EMC Avamar to provide system-wide fault tolerance?

A.
RAID, RAIN, Checkpoints, and Replication
B.
RAID, RAIN, Checkpoints, and HFS check
C.
Asynchronous crunching, Parity, RAIN, and Checkpoints
D.
HFS check, RAIN, RAID, and Replication
A.
RAID, RAIN, Checkpoints, and Replication
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