问题如下：
Which of the following risks is credit-related risk that the investors' transaction price may differ from the price indicated in the market?
选项：
A.Credit migration risk.
B.Default risk.
C.Market liquidity risk.
解释：
C is correct.
Liquidity risk reflects the difference between the market price and actually trading price. Investors need to pay premiums when securities lacks transactions.
老师，为什么不选A呢？应该选自身的risk更准确吧
