Trade may occur out of economies of scale，that is，the ______ adv

Trade may occur out of economies of scale，that is，the ______ advantages of large-scale production.
A、cost
B、production
C、comsumption
D、sale
【正确答案】：A
【题目解析】：Trade may occur out of economies of scale，that is，the cost advantages of large-scale production. 参见教材P81。