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YoumanageaSQLServer2005databasethatcontainsatablewithmanyindexes.Younoticethatdatamodificationperformancehasdegradedovertime.Yoususpectthatsomeoftheindexesareunused.YouneedtoidentifywhichindexeswerenotusedbyanyqueriessincethelasttimeSQLServer2005started.Whichdynamicmanagementviewshouldyouuse？（）

A.sys.dmftsindexpopulation

B.sys.dmexecquerystats

C.sys.dmdbindexusagestats

D.sys.dmdbindexphysicalstats

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