在Java中，运行下面的代码，输出结果是（）

public class Sample {

 int i = 20;

 int j = 10;

 void test(){

      int i = 3;

  System.out.println("result is " + (i+j));

 }

 public static void main(String args[]){

  Sample t = new Sample();

  t.test();

 }

}

• A.result is 30

• B.result is 13

• C.result is 33

• D.编译错误