单项选择题 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 Enterprise Edition instance. There is a database named DB1 in the instance. A backup of DB1 is performed every day. You have to minimize the size of the full database backup files of DB1.  In the options below, which Transact-SQL statement should you use? （）

单项选择题 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? （）

单项选择题 YouworkinacompanywhichisnamedWiikigoCorp.ThecompanyusesSQLServer2008.Youaretheadministratorofthecompanydatabase.NowyouareinchargeofaSQLServer2008instance.ThereisadatabasenamedDB1intheinstance.Atpresentabout90GBofdataisstoredinDB1.Youmadesomeroughcalculationsthateverydayabout1GBofdataismodifiedorinserted.YousettherecoverymodelofDB1toSimple.Accordingtothecompanyrequirements,duringbusinesshours,datalossofmorethan120minutesworthoftransactionsisunacceptable.Youhavetochooseabackupstrategywhichmustcomplywiththefollowingtworequirements:UsingaslittlediskspaceaspossibleComplyingwiththecompanyrequirements.Sowhatactionshouldyouperformtoachievethisgoal?（）