At the beginning of $20$X$1,$ ABC$$s allowance for doubtful accounts equaled $20.$ During $20$X$1,$ ABC recorded write$-$offs of five; and, at the end of the $20$X$1,$ ABC$$s allowance for doubtful accounts equaled $24.$ How much bad debt expense did ABC report during $20$X$1?$

Group of answer choices

$1)$ Five

$2)$ Nine

$3)20$

$4)25$