Allowance for Doubtful Accounts has a credit balance of $699 at the end of the year (before adjustment), and an analysis of receivables estimates the amount of uncollectible accounts to be $14,394. Based on this estimate, which of the following adjusting entries should be made?

a.debit Bad Debt Expense for $699; credit Allowance for Doubtful Accounts for $699

b.debit Bad Debt Expense for $15,093; credit Allowance for Doubtful Accounts for $15,093

c.debit Allowance for Doubtful Accounts for $699; credit Bad Debt Expense for $699

d.debit Bad Debt Expense for $13,695; credit Allowance for Doubtful Accounts for $13,695