Given：   11. static class A {   12. void process（） throws Exception { throw new Exception（）； }   13. }   14. static class B extends A {   15. void process（） { System.out.println（"B "）； }   16. }   17. public static void main（String[] args） {   18. A a = new B（）；   19. a.process（）；   20. }   What is the result？ （）

A、 Compilation fails because of an error in line 19.

B、 An exception is thrown at runtime.

C、 B

D、 Compilation fails because of an error in line 18.

E、 Compilation fails because of an error in line 15. 

F、 The code runs with no output.