Choice "C" is correct. Under the percentage of credit sales approach, uncollectible accounts expense would be debited and allowance for uncollectible accounts would be credited for $180,000 (2% x $9,000,000). For accounts written off, allowance for uncollectible accounts would be debited and accounts receivable would be credited for $325,000. The December 31, 1994 allowance for uncollectible accounts balance would be $115,000 ($260,000 + $180,000 - $325,000).
Choice "b" is incorrect. $180,000 is the 1994 addition to the allowance for uncollectible accounts recognized under the percentage of credit sales method. It does not represent the balance of the account at year-end.
Choice "a" is incorrect. This calculation incorrectly debits the allowance for uncollectible accounts for the $180,000 adjustment.
Choice "d" is incorrect. This calculation does not reduce (debit) the allowance for uncollectible accounts for the $325,000 of accounts written off.