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Yourdatabaseinstanceisfunctionalforthepastonemonth.TheAutomaticWorkloadRepository(AWR)snap
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Yourdatabaseinstanceisfunctionalforthepastonemonth.TheAutomaticWorkloadRepository（AWR）snapshotretentionissetto7andtheSTATISTICS_LEVELinitializationparameterissettoTYPICAL.Youreceiveacomplaintaboutthepoorperformanceofthedatabasebetween7PMand9PMofthepreviousday.Choosetwoactionsanyofwhichcanbereferredtofirsttodiagnosetheproblem.（）
A.UsetheActiveSessionHistoryreport.
B.UsetheAWRComparePeriodsreport.
C.UseanADDManalysisbetween7PMand9PMofthepreviousday.
D.UsetheAWRComparePeriodreportbetween7PMand9PMofthepreviousday.
参考答案: