Choose the correct letter, A, B or C. The method of data collection was

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问题 Choose the correct letter, A, B or C.
The method of data collection was

选项 A、interviews.
B、lab studies.
C、questionnaires.

答案A

解析本题需选数据收集方法，要对常规的数据收集方法耳熟能详。该学生回答：I interviewed employees…，所以选项A为正确答案。

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