1. class A { 
3. public String to String（） { 
4. return “4”； 
5. } 
6. } 
7. class B extends A { 
8. public String toString（） {
9. return super.toString（） + “3”； 
10. } 
11. } 
12. public class Test { 
13. public static void main （String[] args） { 
14. System.out.printIn（new B（））；
15. } 
16. }  
What is the result()？  
 

A. Compilation succeeds and 4 is printed.
B. Compilation …………… is printed.
C. An error on line 9 cause compilation to fail.
D. An error on line 14 cause compilation to fail.
E. Compilation succeeds but an exception is thrown at line 9.