You work in a company which uses SQL Server 2008. You are the administrator of the company database. Now you are in charge of a SQL Server 2008 instance. There is a database named DB1 in the instance. The latest differential backup is performed at 15:30, the full back up was performed at 13:30, and database snapshots were created at 16:30 and at 17:30. The backups and the database snapshots are stored on a different disk from the database files. At 17:05, the hard disk containing the database files fails at 17:02 hours. You must restore DB1 while reduce data loss to the least. 
So what action should you perform to achieve this goal? （） 

A.A full database backup should be performed once daily. During business hour, a transaction log backup should be performed every two hours. 
B.A full database backup should be performed once daily 
C.A full database backup should be performed once daily. During business hours, a differential backup should be performed every two hours 
D.Perform a full database backup should be performed once every week. A differential backup should be performed once daily. During business hours a transaction log backup should be performed every two hours.

A.You should implement Differential backup 
B.You should implement Database snapshots
C.You should implement Primary filegroup backup 
D.You should implement Transaction log backup

A.For the SQL Server Agent, you should enable a fail-safe operator 
B.You should modify the database maintenance plan, making it send an e-mail to the appropriate operators 
C.You should modify the database maintenance plan, making it include a Notify Operator task that e-mails the appropriate operators. 
D.You should modify the SQL Server Agent job. The job executes the database maintenance plan to notify the appropriate operators.