The Allowance for Uncollectible Accounts Currently Has a Credit Balance

The Allowance for uncollectible accounts currently has a credit balance of $900.After analyzing the accounts in the accounts receivable subsidiary ledger using the aging method,the company's management estimates that uncollectible accounts will be $15,000.
-What will be the amount of Uncollectible accounts expense reported on the income statement?

A) $15,900
B) $14,900
C) $14,100
D) $15,000