问题如下图：
C选项是什么含义？两代间的数据开采？也是一个偏差类型吗？
选项：
A. 
B. 
C. 
解释：
NO.PZ2017092702000116 问题如下 A report on long-term storeturns focuseexclusively on all currently publicly trafirms in instry is most likely susceptible to: A.look-ahebias. B.survivorship bias. C.intergenerationta mining. B is correct. A report thuses a current list of stocks es not account for firms thfaile merge or otherwise sappearefrom the public equity market in previous years. a consequence, the report is biase This type of biis known survivorship bias.一份使用当前股票清单的报告，且没有包括那些因为失败、合并而退出市场的公司。 因此，该报告存在偏见。 这种类型的偏见被称为幸存者偏差。 请问这个考点是哪一章的reang中的
survivorship bias. intergenerationta mining. B is correct. A report thuses a current list of stocks es not account for firms thfaile merge or otherwise sappearefrom the public equity market in previous years. a consequence, the report is biase This type of biis known survivorship bias.老师，请把题目翻译一下呢
survivorship bias. intergenerationta mining. B is correct. A report thuses a current list of stocks es not account for firms thfaile merge or otherwise sappearefrom the public equity market in previous years. a consequence, the report is biase This type of biis known survivorship bias.请问A是什么意思呢？一直都没弄明白
can' t unrstanexplanation, want to know fferenbetween look-ahebiansurvivorship bias
