What purpose does the symrdf update command serve?

A.
In an SRDF Failover state, update will begin synchronization prior to resuming operations on the source volumes.

B.
In an SRDF Fallback state, the update command will restore the R2 Volume back to the R1 Volumes.

C.
When in a Failover state, the update function will reset the /var/symapi/db/symapi_db.bin file.

D.
A symrdf update command will reinitialize all the SRDF device groups.