Which three methods, inserted individually at line 14, will correctly complete class Two?

Given:

10. class One {
11. void foo() { }
12. }
13. class Two extends One {
14. //insert method here
15. }

Which three methods, inserted individually at line 14, will correctly complete class Two? (Choose
three.)

A.
int foo() { /* more code here */ }

B.
void foo() { /* more code here */ }

C.
public void foo() { /* more code here */ }

D.
private void foo() { /* more code here */ }

E.
protected void foo() { /* more code here */ }