类Test1定义如下:public class Test1{public float aMethod(float a,float b){}___}根据方法重载的定义,将以下哪种方法插入下划线部分是不合法的?()
A.public float aMethod(float a,float b,float c){} B.public float aMethod(float c,float d){} C.public float aMethod(int a,int b){} D.public float aMethod(int a,int b,int c){}