You need to ensure that the database users should be able to use the various flashback
query features in order to go back in time by four hours. What would you do to achieve this?
(Choose two.)
A.
set DB_FLASHBACK_RETENTION_TARGET=14400
B.
set UNDO_RETENTION=14400
C.
set the RETENTION GUARANTEE clause for the undotablespace
D.
set LOG_CHECKPOINT_INTERVAL=240
E.
issue ALTER DATABASE FLASHBACK ON; command
F.
set SQL_TRACE=True
G.
set FAST_START_MTTR_TARGET=240