问题如下：
Using government bond rates as benchmark and assuming all else being equal, which of the following descriptions about the relationship between liquidity and yield spreads is most correct?
选项：
A.Bonds with greater liquidity have higher yield spreads.
B.Bonds with less liquidity have lower yield spreads.
C.Bonds with less liquidity have higher yield spreads.
解释：
C is correct.
Investors need a higher yield to compensate them for giving up liquidity, so a bond with less liquidity may have a higher yield spread relative to the benchmark.
老师，麻烦再具体讲解下这个题的每一个选项，不是很理解题干，因为题干是在说government bond，为什么问的缺失spread和liquidity的关系？理论上government bond不是应该没有spread吗？
