An aging of a company's accounts receivable indicates that $9000 are estimated to be uncollectible. If Allowance for Doubtful Accounts has a $4240 credit balance, the adjustment to record bad debts for the period will require a

credit to Allowance for Doubtful Accounts for $9000.

debit to Bad Debt Expense for $9000.

debit to Allowance for Doubtful Accounts for $4760.

debit to Bad Debt Expense for $4760.