What function does the Playback Service fulfill when you are using remote Celerra Replication?

A.
Creates a delta set containing block modifications made to the file system at the remote site

B.
Creates a delta set containing block modifications made at the source file system

C.
Reads the delta set from the source file system and updates the source file system after failback

D.
Reads the delta sets from the destination SavVol and updates the destination file system