Which of the following function prototypes would be the best choice for a function that updates the small parameter, if the value of param is greater than small?

The entire function body is shown here:void update$\_$small$($int small, int param$)$;void update$\_$small$($int &small, int param$)$;void update$\_$small$($int small, int & param$)$;void update$\_$small$($int & small, int& param$)$;int update$\_$small$($int small, int param$)$;