网友您好， 请在下方输入框内输入要搜索的题目：
ViewtheExhibittoexaminetheoutputoftheDBA_OUTSTANDING_ALERTSview.After30minutes,youexecutedthefollowingcommand:SQL>SELECTreason,metric_valueFROMdba_outstanding_alerts;REASONMETRIC_VALUE----------------------------------------------------Tablespace[TEST]is[28perce28.125nt]fullWhatcouldbethereasonfortheeliminationoftheotherrowsintheoutput（）
A.AnAutomaticWorkloadRepositorysnapshothasbeentakenrecently.
B.Thenon-threshold-basedalertsaretransferredtoDBA_ALERT_HISTORY.
C.ThethresholdalertsconditionsareclearedandthealertsaretransferredtoDBA_ALERT_HISTORY.
D.ThethresholdalertsrelatedtodatabasemetricsarepermanentlystoredinDBA_ALERT_HISTORYbutnotthethresholdalertsrelatedtoinstancemetrics
参考答案