A Company Has an Allowance for Uncollectible Accounts of $1,000,a

A company has an allowance for uncollectible accounts of $1,000,a positive number,at the end of the year,before the adjusting entry is made to record this year's bad debts expense.The allowance account has a positive balance because ________.

A) the allowance always has a positive balance
B) the allowance created at the end of last year was too small to cover all of the accounts written off this year
C) the allowance created at the end of last year was larger than the total of all of the accounts written off this year
D) the balance in the allowance must always equal bad debts expense for the year.