Which two statements complete a transaction?（） A:DELETE employees; B:DESCRIBE employees; C:ROLLBACK TO SAVE POINT C; D:GRANT SELECT ON employees TO SCOTH E:ALTER TABLE employees SET UNUSED COLUMN sal; F:Select MAX(sal) FROM employees WHERE department _ id 20;

Which two statements complete a transaction?（）
A:DELETE employees;
B:DESCRIBE employees;
C:ROLLBACK TO SAVE POINT C;
D:GRANT SELECT ON employees TO SCOTH
E:ALTER TABLE employees SET UNUSED COLUMN sal;
F:Select MAX(sal) FROM employees WHERE department _ id 20;

出自：Oracle认证

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