which commands must you execute to enable SCOTT to flash back the transactions?

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?

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;