Answer:
The correct answer is Debit to Bad debt expense for $4,900, unfortunately none of the options provided in the question is correct.
Step-by-step explanation:
Bad debt expense is an estimated amount of accounts receivable that is deemed to be uncollectible. There are different methods used in determining the bad debt expense - aging method, percentage-of-credit-sales method.
In the question, an amount of $4,000 was already estimated as uncollectible meanwhile the Allowance for Doubtful Accounts has a $900 debit balance. This means the bad debt expense that would be recorded would be $4,000 + $900 = $4,900. The addition is necessary in order to reinstate the Allowance for Doubtful Accounts to $4,000 and since the opening balance of the allowance account is in debit. Required journal entries are as follows:
Debit Bad debt expense $4,900
Credit Allowance for Doubtful Accounts $4,900
(To record bad debt expense)