YourdatabaseisrunningunderautomaticundomanagementandtheUNDO_RETENTIONparameterissetto900sec.Youexecutedthefollowingcommandtoenableretentionguarantee:SQL>ALTERTABLESPACEundotbs1RETENTIONGUARANTEE;Whateffectwouldthisstatementhaveonthedatabase?()
A.Theextentsinundotablespaceretaindatauntilthenextfulldatabasebackup.
B.Theextentscontainingcommitteddataintheundotablespaceareneveroverwritten.
C.Theextentswhichnolongercontainuncommitteddataintheundotablespacearenotoverwrittenforatleast15minutes.
D.Theextentscontainingcommitteddataintheundotablespacearenotoverwrittenuntiltheinstanceisshutdown.