Youexecutedthefollowingqueryinyourdatabase:SELECToldest_flashback_scn,oldest_flashback_timeFROMV$FLA
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A.Thetimewhenthelastflashbackoperationinyourdatabasewasperformed.
B.Thetimewhenthefirstflashbackoperationinyourdatabasewasperformed.
C.AlistofflashbackoperationsperformedinyourdatabaseusingSCNandtime.
D.Theapproximatetimeandthelowestsystemchangenumber(SCN)towhichyoucanflashbackyourdatabase.
参考答案: