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;