A bookkeeper twice posted an entry for $9,500 in advertising work done for a customer because the invoice was mailed twice by mistake. What is the impact of this error on the trial balance, the service revenue account, and the accounts receivable account? Select one: O a. The trial balance would be in balance, service revenue would be overstated by $9,500 and accounts receivable would be overstated by $9,500. O b. The trial balance would be in balance, service revenue would be understated by $19,000, and accounts receivable would be understated by $19,000. . The debit side of the trial balance would be $19,000 higher than the credit side of the trial balance, service revenue would be overstated by $9,500, and accounts receivable would be understated by $9,500. Od. The debit side of the trial balance would be $19,000 lower than the credit side of the trial balance, service revenue would be understated by $19,000, and accounts receivable would be overstated by $19,000