You are the network administrator for The network consists of a single Active Directory domain named All network servers run Windows Server 2003, and all client computers run Windows XP Professional. You are required to implement a backup strategy for all five servers on the network. You use the Backup Utility to schedule nightly backup jobs. You create a domain user account named BackupSvc, and add it to the local Backup Operators group on all file servers. The scheduled backup jobs will use BackupSvc to log on to the network Nightly backups occur successfully for six weeks. Then, nightly backups fail on all servers. When you examine the event log of one server, you discover that the password for BackupSvc is expired. You reset the password and select the Password never expires option for BackupSvc. The next day, you discover that the previous night's backup failed on all file servers. You need to ensure that the next night's backup is successful. Which two actions should you perform? (Each correct answer presents part of the solution.（） Choose two)

• A、Stop and restart every file server.
• B、Stop and restart the backup application on every file server.
• C、Change the password for the backup job on every file server.
• D、In Active Directory Users and Computers, increase the value of the Account lockout threshold option.
• E、Unlock the BackupSvc account.