Which of the following methods are overloaded?

A. public int max (int a, int b) { … }
B. public double max (double a, double b) { … }
C. public int max (int a, int b, int c) { … }
D. public double max (double a, double b, double c) { … }

a) A and B are overloaded; C and D are overloaded
b) A and C are overloaded; B and D are overloaded
c) A, B and C are overloaded
d) All these four methods are overloaded

d) All these four methods are overloaded