不懂

问题如下：

If analyst used the current company list of manufacturing industry, which bias is most likely exist?

选项：

Survivorship bias

Data-mining bias

Time-period bias

解释：

A is correct, by definition, survivorship bias is usually derives from sample selection for only the existing portfolio are included.

根据定义，幸存者偏差通常源自样本选择，因为样本中仅仅包括现有投资组合，而失败的投资组合无法被统计。