Which two tasks should you perform before enabling Flashback Databas

Your database is running in archivelog mode and Automatic Undo Management is enabled.
Which two tasks should you perform before enabling Flashback Databas

A.
Ensure that the db_flashback_retention_target parameter is set to a point in time (in
minutes) to which the database can be flashed back.

B.
Enable the recyclebin.

C.
Enable undo retention guarantee.

D.
Enable Fast Recovery Area.

E.
Enable minimal supplemental logging.