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、You should restore the full backup 
• B、You should restore the database snapshot from 16:30 hours. 
• C、You should restore the database snapshot from 17:30 hours 
• D、You should restore both the full backup and the differential backup.