类Test定义如下，将下列( )方法插入③行处是不合法的。
① public class Test
② public float Method (float a,float b)
③
④

A．public float Method (float a,float b,float c)

B．pubic float Method(floatc,floatd)

C．public int Method (int a,int b)

D．pivate float Method (int a,int b,int c)