Consider the following recursive function fun$($x$,$ y$).$

def fun$($x: int, y: int$)$:

if x $==0$:

return y

return fun$($x $-1,$ x $+$ y$)$

Which of the following calls will cause this function to become infinite?

Group of answer choices

fun$(20,-1)$

fun$(20,20)$

fun$(-1,20)$

fun$(0,20)$

fun$(20,0)$