为自己加油

Which two queries execute successfully?

A.SELECT NULLIF(100, 100) FROM DUAL
B.SELECT NULLIF(100,A.FROM DUAL;
C.SELECT COALESCE(100, 'A.FROM DUAL;
D.SELECT COALESCE(100, NULL, 200)FROM DUAL;
E.SELECT NULLIF(NULL, 100)FROM DUAL;