Which three queries execute successfully? (Choose three.)

[answerhappygod]

Which three queries execute successfully? (Choose three.)

A. SELECT 1 - SYSDATE - DATE '2019-01-01' FROM DUAL;
B. SELECT SYSDATE - DATE '2019-01-01' - 1 FROM DUAL;
C. SELECT SYSDATE / DATE '2019-01-01' - 1 FROM DUAL;
D. SELECT SYSDATE - 1 - DATE '2019-01-01' FROM DUAL; E. SELECT (SYSDATE - DATE '2019-01-01') / 1 FROM DUAL; F. SELECT 1 / SYSDATE - DATE '2019-01-01' FROM DUAL;