麻烦能翻译一下题目的意思么？
问题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2015121801000071 问题如下 The set of portfolios on the minimum-varianfrontier thminates all sets of portfolios below the globminimum-varianportfolio is the: A.capitallocation line. B.Markowitz efficient frontier. C.set of optimrisky portfolios. is correct.The Markowitz efficient frontier hhigher rates of return for a given level of risk. With respeto the minimum-varianportfolio, the Markowitz efficient frontier is the set of portfolios above the globminimum-varianportfolio thminates the portfolios below the globminimum-varianportfolio. 这句话“minates all sets of portfolios below the globminimum-varianportfolio”没看懂
NO.PZ2015121801000071 问题如下 The set of portfolios on the minimum-varianfrontier thminates all sets of portfolios below the globminimum-varianportfolio is the: A.capitallocation line. B.Markowitz efficient frontier. C.set of optimrisky portfolios. is correct.The Markowitz efficient frontier hhigher rates of return for a given level of risk. With respeto the minimum-varianportfolio, the Markowitz efficient frontier is the set of portfolios above the globminimum-varianportfolio thminates the portfolios below the globminimum-varianportfolio. 沒太理解題目在問什麼？
NO.PZ2015121801000071 minimum-varianfrontier是指什么
为什么是below？不是above？
请问C a set of optimrisky portfolio 不对吗？EF也是一系列最优风险资产组合的点呀。
