User SCOTT wants to back out the transactions on the REGIONS table in his schema. As a DBA, whichcommands 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