Which of the following errors, each considered individually, would cause the trial balance totals to be unequal? a.Cash received from customers on account was posted as a debit of $720 to Cash and a credit of $720 to Accounts Payable. b.A payment of $4,450 to a creditor was posted as a debit of $4,500 to Accounts Payable and a credit of $450 to Cash. c.A payment of $67 for insurance was posted as a debit of $76 to Prepaid Insurance and a credit of $76 to Cash. d.A transaction was not posted.