假设有个类已经定义了下述的变量:int num1=10;int num2=20;String word=new String("exam");double answer=25.5;另外定义了以下方法头:public int stuff(String s, int x, int y)以下哪个是正确的方法调用?
A. num1=stuff("hello",num1,num1);
B. answer=stuff(word,answer,num2);
C. num2=stuff("hello",num1,answer);
D. num1=stuff(num1,num2,word);
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