多項選擇題

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?()

A. public void foo() { /* more code here */ }
B. private void foo() { /* more code here */ }
C. protected void foo() { /* more code here */ }
D. int foo() { /* more code here */ }  
E. void foo() { /* more code here */ }

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