A customer has three remote sites that contain large NAS mounted file systems. They would like to back up to their centrally located EMC Avamar server.
What is the recommended method for performing these backups?

A.
Install NDMP accelerator nodes in each remote site, backing up to the centrally located Avamar grid over the WAN

B.
Install an NDMP accelerator node at the central site for all remote site NDMP backups through the WAN links

C.
Install Avamar client software on the NAS devices in each remote site, backing up to the centrally located Avamar grid over the WAN

D.
Install Avamar client software on servers which have the file systems mounted and schedule the jobs through the Administrative Console GUI