对于下列代码：<br /> <img src="https://nimg.ppkao.com/2019-05/wangjing/2019050614324287022.jpg?sign=96c4466fbe5e81f7bb4bcbe47704a6b3&t=62d5de97" /><br /> 下述哪些方法可以加入类Child？（）

A、 int addValue（ int a， int b ）{// do something...}

B、 public void addValue （int a， int b ）{// do something...}

C、 public int addValue（ int a ）{// do something...}

D、 public int addValue（ int a， int b ）throws MyException {//do  something...}