Which of the following statements is$/$are TRUE when calling this function?

int f$2($int x$,$ int y$)\{$

ln$($tres$)=++$x$+$x$+++$y$++$y$-$x;

return x $<$ y $?++$res: res$++,*$ res;

$\}$

a$.$ Any negative arguments guarantee negative returning value

b$.$ Positive arguments guarantee non$-$negative returning value

c$.$ If x is negative then the resulting value is always negative

d$.$ Equal argument values guarantee the resulting value to be non$-$negative