When using Celerra Replication, what is the function of the Playback service?

A.
A Create a delta set containing block modification made to the file system at the remote site

B.
A Create a delta set containing block modification made at the source file system

C.
Reads the delta set from the source file system and update the source file system after fail back

D.
Reads the delta sets from the destination savVol and update destination file system