Concept:Cheques are money substitutes, not money, because money must be legal tender and generally acceptable.Explanation:Money in Nigeria consists of the naira notes and coins that the law makes legal tender for settling debts.A cheque is only an order to a bank to pay money; it does not itself have the legal status of money.Creditors can legally refuse a cheque, whereas they cannot refuse legal tender in settlement of debts.So among the options, the reason is that cheques are not legal tender.Answer:B. They are not legal tender.