Which of the following functions is a properly overloaded function of the following?

int doSomething(int first, float second);
a. float doSomething(int first, float second);
b. int doSomething( int next, float last);
c. int doSomething(int first, int second, float third);
d. int doSome(int first, float second);

d. int doSome(int first, float second);