Which of the following correctly defines a Java method?

a) byte max(byte x, byte y) return 0;

b) int max(x,y) {if(x>y) return x; else return y;}

c) short max(short x, short y) { return x;}

d) double max {return 2.5;}

e) float max {return 1.5f;}

f) char max() (return a;)