问题如下图：
选项：
A. 
B. 
C. 
D. 
解释：
I 为什么不对吖？
NO.PZ2016071602000022 问题如下 The Big Bucks hee funhthe following scription of its activities. It uses simultaneous long anshort positions in equity with a net beta close to zero. Whiof the following statements about Big Bucks is/are correct?I. It uses a rectionstrategy.II. It is a relative value hee funIII. This funis exposeto iosyncratic risks. A.I anII B.II anIII C.I anIII II only B is correct. This funhzero betso is a relative value fun It is, however, exposeto iosyncratistock-specific risk. 老师这道题里面表述1不选，我是通过排除法选出来的，所以想问一下什么样的算赌方向的那种策略？只有long或者只有short的头寸，这样算rectionstrategy吗？
NO.PZ2016071602000022 问题如下 The Big Bucks hee funhthe following scription of its activities. It uses simultaneous long anshort positions in equity with a net beta close to zero. Whiof the following statements about Big Bucks is/are correct?I. It uses a rectionstrategy.II. It is a relative value hee funIII. This funis exposeto iosyncratic risks. A.I anII B.II anIII C.I anIII II only B is correct. This funhzero betso is a relative value fun It is, however, exposeto iosyncratistock-specific risk. relative value fun师相对价值策略不是A股票相对于B股票价格便宜，所以longA，shortB，这里针对同一只股票即long又short，也叫relative 策略？
NO.PZ2016071602000022 1.有哪些是直接法呢 2.直接法就是预判趋势？ 3.相对法就是消掉系统性风险然后同时拥有long anshort去承担非系统性风险？
为什么是relative value strategy 呢？这个概念在讲义的哪里
