Accounts receivable net realizable value for Castle Company. increased from $380,000 to $430,000 from January 1, 2018 to December 31, 2018. Also, you collected the following information: Accounts receivable, 12/31/17 $533,000 Accounts receivable, 12/31/18 $622,000 Accounts written off as uncollectible $21,000 Recovered accounts, that were previously written off $6,000 What are the balances for allowance for doubtful accounts at the beginning and end of the period

A. $380,000 and $430,000

B. $153,000 and $192,000

C. $33,000 and $22,000

D. Could not be determined