All of the Statements Concerning Bad and Doubtful Debts Are

All of the statements concerning bad and doubtful debts are correct, except:

A) Doubtful debts can be estimated by applying a given percentage to credit sales.
B) Bad debts written off is an expense that relates to situations where there is a high degree of certainty that the amount owed will never be paid, e.g. the bankruptcy of the debtor.
C) Doubtful debts relate to amounts unlikely to be received from debtors but where the business is still trying to collect the sum owed.
D) The account 'doubtful debts' is a contra asset account deducted from debtors in the balance sheet.