YouaremanaginganOracleDatabase11gdatabaserunninginARCHIVELOGmode.TheFlashRecoveryAreaisspecifiedasthedestinationforthearchivedredologfiles.Younoticethiswarninginthealertlogfile：ORA-19815：WARNING：db_recovery_file_dest_sizeof3221225472bytesis100.00%used，and
题目
YouaremanaginganOracleDatabase11gdatabaserunninginARCHIVELOGmode.TheFlashRecoveryAreaisspecifiedasthedestinationforthearchivedredologfiles.Younoticethiswarninginthealertlogfile：ORA-19815：WARNING：db_recovery_file_dest_sizeof3221225472bytesis100.00%used，andhas0remainingbytesavailable.WhatwouldyoudotoreclaimtheusedspaceintheFlashRecoveryArea（）
A.BackuptheFlashRecoveryArea.
B.Decreasetheretentiontimeforthedatabasebackupandflashbacklogfiles.
C.ManuallydeleteallthearchivedlogfilesfromtheFlashRecoveryAreabyusingoperatingsystem（OS）commands.
D.ManuallydeletealltheexpiredbackupsetsfromtheFlashRecoveryAreabyusingoperatingsystem（OS）commands.