题目:类A定义如下: 1. public class A{ 2. public float f(float a,float b){} 3. 4.} 将以下哪种方法插入行三是不合法的。( )
A. public float f(float a,float b, float c){}
B. pubic float f(float c,float d){}
C. public int f(int a,int b){}
D. private float f(int a,int b,int c){}
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