问题如下：
Which of the following return calculating methods is best for evaluating the annualized returns of a buy-and-hold strategy of an investor who has made annual deposits to an account for each of the last five years?
选项：
A.Geometric mean return.
B.Arithmetic mean return.
C.Money-weighted return.
解释：
A is correct.
The geometric mean return compounds the returns instead of the amount invested.
不太明白老师的解答。MWRR在于投资者每期投入或者收回现金，应该是投资者可以控制现金流，而这里刚刚好是投资者定期会存一笔钱，为什么要扯到基金manger？投资者能控制现金流，不就是MWRR吗？我们在将TWRR vs MWRR，最主要的明明 是一个是看CF一个是return
