4 An administrator has a backup for client Linux1 using the LinuxClients policy completesuccessfully. Even though the policy Backup Selections are NOT modified, the backup job fails thenext day with the following status code:Error 71: none of the files in the file list exist.What is a possible reason the job failed?
(A) The "Enable granular recovery" option was unset.
(B) The client was added to another backup policy.
(C) The file systems have been unmounted on the client.
(D) The client was temporarily shut down.