单项选择题

A.You should use the EXTENDED_LOGICAL_CHECKS option to execute a DBCC CHECKDB statement on the AdventureWorks database by. 
B.You should identify whether the SQL Server Agent is started on the primary server. 
C.You should identify whether the AdventureWorks database uses the Simple recovery model. 
D.You should identify whether the SQL Server Volume Shadow Copy Service (VSS) Writer is started on the primary server

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