A-A+ A.By the negotiation among the sellers buyers 2022-02-08 22:44:36 问答库 阅读 问题详情 A.By the negotiation among the sellers, buyers and the exchange.B.By using an auction process.C.By the exchange.D.By the negotiation among the sellers and the buyers.请帮忙给出正确答案和分析,谢谢! 参考答案 查看解答