Which statement is true about the classes and interfaces in the exhibit?
01. public interface A {
02. public void doSomething(String thing);
03. }
01. public class AImpl implements A {
02. public void doSomething(String msg) {}
03. }
01. public class B {
02. public A doit(){
03. //more code here
04. }
05. public String execute(){
06 //more code here
07 }
08. }
01. public class C extends B {
02. public AImpl doit(){
03. //more code here
04. }
05.
06. public Object execute() {
07. //more code here
08. }
09. }
A. Compilation will succeed for all classes and interfaces.
B. Compilation of class C will fail because of an error in line 2.
C. Compilation of class C will fail because of an error in line 6.
D. Compilation of class AImpl will fail because of an error in line 2.
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