问题如下图：
选项：
A. 
B. 
C. 
解释：
Can not get the point of 这道题，AC错在哪？
NO.PZ2015122802000061问题如下Whiof the following statements regarng sector inces is most accurate? Sector inces:A.trafferent economic sectors ancannot aggregateto represent the equivalent of a bromarket inx.B.provi a means to termine whether active investment manager is more successful stoselection or sector allocation.C.apply a universally agreeupon sector classification system to intify the constituent securities of specific economic sectors, suconsumer goo, energy, finance, health care. is correct.Sector inces provi a means to termine whether a portfolio manager is more successful stoselection or sector allocation.考点行业指数A:行业指数跟踪不同的经济部门，不能汇总到一起代表一个广泛的市场指数。（后半句说反了，caggregateto represent the equivalent of a bromarket inx）B:行业指数提供了一种方法来判断一个活跃的投资经理在股票选择或行业配置方面是否更成功。正确C:行业指数应用一个公认的行业分类系统来识别特定经济部门的组成证券，比如消费品、能源、金融和医疗。(错，不存在universally agreeupon sector classification system) 能翻译一下么看不懂
请老师下三个的意思，和正确答案的知识点
这个知识点在讲义的哪一页呢？谢谢老师
请问第一个为啥不对
