问题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2016021705000019 问题如下 The cost of equity is equto the: A.expectemarket return. B.rate of return requirestockholrs. C.cost of retaineearnings plus vin. is correct.The cost of equity is finethe rate of return requirestockholrs. 这道题问的不是等于什么吗。
NO.PZ2016021705000019 问题如下 The cost of equity is equto the: A.expectemarket return. B.rate of return requirestockholrs. C.cost of retaineearnings plus vin. is correct.The cost of equity is finethe rate of return requirestockholrs. 为什么C会错呢？
the cost of equity是不是就是cost of common stock？ 也就是re？
之前的答案讲解的有些复杂，没有看懂。麻烦请一下这个知识点的逻辑，并且一下C，谢谢
