问题如下：
Which of the following descriptions about exchange-traded derivatives is most correct?
选项：
A.Exchange-traded derivatives are less transparent.
B.Exchange-traded derivatives are customized contracts.
C.Exchange-traded derivatives have low default risk.
解释：
C is correct. Exchange-traded derivatives are standardized and have a high degree of transparency. In addition, exchange-traded derivatives have low default risk because the clearing and settlement pricess provides a credit guarantee.
c不应该是no default吗？
