给出下面的代码 public class Parent { public int addValue( int a, int b) { int s; s = a+b; return s; } } class Child extends Parent { } 哪些方法可以加入类Child中?
A.
int addValue( int a, int b ){// do something...}
B.
public void addValue (){// do something...}
C.
public int addValue( int a ){// do something...}
D.
public int addValue( int a, int b )throws Exception {//do something...}