Which of the following internal control activities will most likely prevent the concealment of a cash shortage by improperly writing off a trade account receivable?
a. Write- offs must be approved by a responsible officer after review of credit department recommendations and supporting evidence.
b. Write- offs must be supported by an aging schedule showing that only receivables over-due several months have been written off.
c. Write- offs must be approved by the cashier who is in a position to know whether the receivables have, in fact, been collected.
d. Write- offs must be authorized by company field sales employees who are in a position to determine customers’ financial standing.