单选题

现有如下代码： class Super { public float getNum() { return 3.0f; } } class Sub extends Super { // 空白处 } 请问以下哪个语句放置在注释的空白处会引起编译错误？

Question

A. public float getNum(){return 4.0f;}

B. public void getNum(){}

C. public void getNum(double d){}

D. public double getNum(float d){return 4.0;}