The Balances of the Allowance for Doubtful Accounts on the Balance

Short Answer

The balances of the allowance for doubtful accounts on the balance sheets dated December 31 of 2010 and 2009 were $2,000 and $7,000, respectively. During 2010, bad debts expense was $12,000. What is the amount of accounts receivable that were written off as uncollectible during 2010?
a. $22,000
b. $8,000
c. $17,000
d. $2,000