单选题 A scientist working for a pharmaceutical company tries many models using the same data before reporting the one that shows that the given drug has no serious side effects. The scientist is guilty of:

A、

A. look -ahead bias.
B、

B. time -period bias.
C、

C. data mining.

【正确答案】 C

【答案解析】Data mining is the process where the same data is used with different methods until the desired results are obtained.