问题如下图：
选项：
A. 
B. 
C. 
解释：
从哪里可以看到borrowing
Wendy_品职助教 · 2019年06月18日
解题思路：
这道题的考点是CAL的定性表述和两基金分离定律，关键是要读懂题目和判断考点。
dominate是优于、胜过的意思。这道题目问的是CAL上能获得比切点（optimal risky portfolio）还高的return是因为什么？
CAL切点的右上方的组合是borrowing portfolio，，通过向银行借钱投资optimal risky portfolio，能获得比切点（optimal risky portfolio）还高的return。
易错点分析：这道题有两个难点，首先，有些同学没有读懂题干的意思，不知道题目在说什么。其次，没有想到考点是什么。日常练习的时候遇到定性的题目，可以多读几遍题目，慢慢熟悉协会的定性表述，这是我们要逐渐培养的技能。
NO.PZ2015121801000073 问题如下 Compareto the efficient frontier of risky assets, the minant capitallocation line hhigher rates of return for levels of risk greater ththe optimrisky portfolio because of the investor’s ability to: A.lenthe risk-free rate. B.borrow the risk-free rate. C.purchase the risk-free asset. is correct.The Cminates the efficient frontier all points except for the optimrisky portfolio. The ability of the investor to purchase aitionamounts of the optimrisky portfolio borrowing (i.e., buying on margin) the risk-free rate makes higher rates of return for levels of risk greater ththe optimrisky asset possible. 不懂为啥能看出来用risk free rate来借钱？borrowing portfolio不是只能看出我的资产配比中使用了杠杆来增加了有风险股票投资吗？
NO.PZ2015121801000073问题如下Compareto the efficient frontier of risky assets, the minant capitallocation line hhigher rates of return for levels of risk greater ththe optimrisky portfolio because of the investor’s ability to:A.lenthe risk-free rate.B.borrow the risk-free rate.C.purchase the risk-free asset.is correct.The Cminates the efficient frontier all points except for the optimrisky portfolio. The ability of the investor to purchase aitionamounts of the optimrisky portfolio borrowing (i.e., buying on margin) the risk-free rate makes higher rates of return for levels of risk greater ththe optimrisky asset possible.如果没有这个优于，就选c
NO.PZ2015121801000073 问题如下 Compareto the efficient frontier of risky assets, the minant capitallocation line hhigher rates of return for levels of risk greater ththe optimrisky portfolio because of the investor’s ability to: A.lenthe risk-free rate. B.borrow the risk-free rate. C.purchase the risk-free asset. is correct.The Cminates the efficient frontier all points except for the optimrisky portfolio. The ability of the investor to purchase aitionamounts of the optimrisky portfolio borrowing (i.e., buying on margin) the risk-free rate makes higher rates of return for levels of risk greater ththe optimrisky asset possible. 请问为什么不是c？CAL不是optimrisky asset anrisk free asset连在一起的线吗？
题目有点没懂，想知道题目里面higher，greater这种断句怎么断？