The debit side of a trial balance totals $50 more than the credit side. This could be due to: (A) a purchase of goods for $50 being omitted from the payables account. (B) a sale of goods for $50 being omitted from the receivables account. (C) an invoice of $25 for electricity being credited to the electricity account. (D) a receipt for $50 from a debtor being omitted from the cash book.