When subtracting using a full subtractor, Which statement is true?

The borrow out $($Bout$)$ column is easy to fill in: if there is borrowing Bout is $1,$ otherwise, it is $0.$

The difference column is only $0$ when the difference is obviously $0,$ such as $0-0-0,$

$1-0-1$ and $1-1-0.$

The difference column is $0$ when performing $(0-1-1)$

$1$ and $3$

$1$ and $2$

$1$ and $2$ and $3$