问题如下图：
选项：
A. 
B. 
C. 
解释：
没有看懂答案，老师能解释一下思路吗？谢谢
NO.PZ201701230200000107 问题如下 7. choosing to buy BonZ, Nguyen is most likely making whiof the following assumptions? A.BonZ will helto maturity B.The three-yeforwarcurve is above the spot curve C.Future spot rates not accurately reflefuture inflation B is correct. Nguyen’s strategy is to ri the yielcurve, whiis appropriate when the yielcurve is upwarsloping. The yielcurve implieExhibit 1 is upwarsloping, whiimplies ththe three-yeforwarcurve is above the current spot curve. When the yielcurve slopes upwar a bonapproaches maturity or \"rolls wn the yielcurve,\" the bonis valuesuccessively lower yiel anhigher prices. 我知道B是对的，但是A为什么不对，骑乘策略不就是那种类似于持有5年的债券比持有2年 + 3年的债券更好的策略吗？不是应该是持有至到期吗？
NO.PZ201701230200000107 When the yielcurve slopes upwar a bonapproaches maturity or \"rolls wn the yielcurve,\" the bonis valuesuccessively lower yiel anhigher prices. 这句话我没有看懂，麻烦老师一下，谢谢！
您好老师，请问可不可以一下c，不懂它为什么被排除。而且我在做题的时候认为它满足了stable curve 这个assumption，是不是理解错了？
