问题如下：
According to the above information, use CAPM model to calculate the cost of equity:
选项：
A.11%
B.14%
C.25%
解释：
B is correct. re=2%+1.5(10%-2%)=14%
请教老师，按照这道题目用CAMPM算出来的cost of equity和用 GGM模型算出来的cost of equity完全不一样，用GGM模型算出来cost of equity是31.83%，那这样子两种模型现实当中，应该参考哪种方法算的cost of equity？
