An aging of a company's accounts receivable indicates that $4,500 are estimated to be uncollectible. If Allowance for Doubtful Accounts has a $1,600 credit balance, the adjustment to record bad debts for the period will require a A. credit to Allowance for Doubtful Accounts for $4,500 B. debit to Bad Debt Expense for $6,100 C. debit to Bad Debt Expense for $2,900 D. debit to Bad Debt Expense for $4,500