An aging of a company's accounts receivable indicates that estimate of the uncollectible accounts totals $4,731. If Allowance for Doubtful Accounts has a $810 credit balance, the adjustment to record the bad debt expense for the period will require a:________.
a. debit to Allowance for Doubtful Accounts for $3,921.
b. debit to Bad Debt Expense for $3,921.
c. credit to Allowance for Doubtful for $4,731.
d. debit to Allowance for Doubtful Accounts for $4,731