Which of the following methods of determining bad debt expense does not properly match expense and revenue? a. Charging bad debts with a percentage of sales under the allowance method. b. Charging bad debts with an amount derived from a percentage of accounts receivable 35. under the allowance method Charging bad debts with an amount derived from aging accounts receivable under the allowance method. c. d. Charging bad debts as accounts are written off as uncollectible