NO.PZ2023091802000015
问题如下：
Which of the following descriptions about exchange trading system is most correct?
选项：
A.The contracts traded do not have to be the standard contracts
B.Participants contact each other directly to trade.
C.Trades are made in such a way as to reduce credit risk.
D.If there is a misunderstanding, the call between the two parties is recorded.
解释：
C
老师想问下，C选项提到了credit risk, exchange交易是不是既可以降低credit risk也可以降低counterparty risk？如果选项里有ctpy risk，也是可以选的。
