An auditor reconciles the total of the accounts receivable subsidiary ledger to the general ledger control account, as of October 31. By this procedure, the auditor would be most likely to learn of which of the following? A. An October check from a customer was posted in error to the account of another customer with a similar name. B. An opening balance in a subsidiary ledger account was improperly carried forward from the previous accounting period. C. An October invoice was improperly computed. D. An account balance is past due and should be written off