According to the provisions of the Measures for the Administration of Futures Companies, customers can issue trading orders by telephone or other entrustment methods. In this regard, the following statement is correct (). Answer: a, b, c

ABC Analysis According to Article 56 of the Measures for the Administration of Futures Companies, customers can issue trading orders by written, telephone, computer, Internet and other entrustment methods. Where a trading order is issued in written form, the customer shall fill in a written trading order form; Where a trading order is issued by telephone, the futures company shall record it synchronously; Where trading orders are issued by three parties through computers or the Internet, the futures company shall keep the trading orders in an appropriate way.