Consider some function that passes by reference:

void fun$($int &first, int &second$)$

What happens when the function is called and the same variable is passed twice?

For example:

fun$($total$,$ total$)$

Group of answer choices

An automatic compiler optimization, resulting in a smaller memory profile for the function.

A pair of dangling pointers.

Collisions between aliases.

Inadvertent recursion.

A compiler error.