You have a customer that is considering replacing a Network Appliance solution with a Celerra NS80. The customer currently supports CIFS and NFS, but none of the existing file systems are accessed by both CIFS and NFS. The customer requires that migration happen with minimal downtime or end-user impact. Which solution do you recommend?

A.
Celerra FileMover and DiskXtender

B.
Celerra Replicator

C.
Rainfinity

D.
Robocopy