运行上面的程序，下面选项中哪几个更改永久保存到数据库（）

SYS@lhrdb> create table  EMPLOYEE
  2  (
  3     first_name     VARCHAR2(20),
  4    last_name      VARCHAR2(25),
  5    salary         NUMBER(8,2)
  6  );
Table created.
SYS@lhrdb> BEGIN
  2    INSERT INTO EMPLOYEE(SALARY,LAST_NAME,FIRST_NAME) VALUES(35000,'WANG','FRED');
  3    SAVEPOINT SAVE_A;
  4    
  5    INSERT INTO EMPLOYEE(SALARY,LAST_NAME,FIRST_NAME) VALUES(40000,'WOO','DAVID');
  6    SAVEPOINT SAVE_B;
  7    
  8    INSERT INTO EMPLOYEE(SALARY,LAST_NAME,FIRST_NAME) VALUES(50000,'LDD','FRIK');
  9    SAVEPOINT SAVE_C;
 10    
 11    INSERT INTO EMPLOYEE(SALARY,LAST_NAME,FIRST_NAME) VALUES(45000,'LHR','DAVID');
 12    INSERT INTO EMPLOYEE(SALARY,LAST_NAME,FIRST_NAME) VALUES(25000,'LEE','BERT');
 13    ROLLBACK TO SAVEPOINT SAVE_C;
 14  
 15    INSERT INTO EMPLOYEE(SALARY,LAST_NAME,FIRST_NAME) VALUES(32000,'CHUNG','MIKE');
 16    ROLLBACK TO SAVEPOINT SAVE_B;
 17    
 18    COMMIT;
 19  END;
 20  /
PL/SQL procedure successfully completed.
SYS@lhrdb> SELECT * FROM EMPLOYEE;
FIRST_NAME           LAST_NAME                     SALARY
-------------------- ------------------------- ----------
FRED                 WANG                           35000
DAVID                WOO                            40000