单项选择题

A.2)Theconnectionbetweentheserverandtheclientapplicationterminatesbecauseofanetworkfailure.3)Aschemaisaccidentallydropped.4)Thetablespaceisaccidentallydroppedfromthedatabase.5)Theharddiskgetscorruptedandthedatafilesinthediskarelost.6)Thedatabaseinstanceabnormallyshutsdownbecauseofpowerfailure.WhichscenariosrequireDBAinterventiontoperformrecovery()
A.1,3,and6
B.4,5,and6
C.3,4,and5
D.1,2,and6
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