【多选题】You require the Oracle server to manage the undo segments and space among various active sessions automatically. You created an undo tablespace, UNDO_TBS1, in your database. Which two additional steps...
A.
Set the UNDO_RETENTION parameter to 900 or more.
B.
Create an initial undo segment in the undo tablespace.
C.
Enable the retention guarantee for the undo tablespace.
D.
Set the UNDO_TABLESPACE parameter to UNDO_TBS1.
E.
Set the UNDO_MANAGEMENT initialization parameter to AUTO.