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QUESTION 31
You administer a Microsoft SQL Server 2012 database that contains a table named OrderDetail. You discover that the NCI_OrderDetail_CustomerID non-clustered index is fragmented. You need to reduce fragmentation. You need to achieve this goal without taking the index offline. Which Transact-SQL batch should you use?

A.    CREATE INDEX NCI_OrderDetail_CustomerID ON OrderDetail.CustomerID WITH DROP EXISTING
B.    ALTER INDEX NCI_OrderDetail_CustomerID ON OrderDetail.CustomerID REORGANIZE
C.    ALTER INDEX ALL ON OrderDetail REBUILD
D.    ALTER INDEX NCI_OrderDetail_CustomerID ON OrderDetail.CustomerID REBUILD

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