User SCOTT wants to back out the transactions on the REGIONS table in his schema. As a DBA, which commands must you execute to enable SCOTT to flash back the transactions? (Choose four.)
A.
ALTER DATABASE FLASHBACK ON;
B.
GRANT SELECT any transaction TO scott;
C.
GRANT EXECUTE ON dbms_flashback TO scott;
D.
ALTER DATABASE ADD SUPPLEMENTAL LOG DATA;
E.
ALTER TABLESPACE undots1 RETENTION GUARANTEE;
F.
ALTER DATABASE ADD SUPPLEMENTAL LOG DATA (PRIMARY KEY) COLUMNS;