According to paragraph 3, two important things for an effective survey are________.

Câu hỏi :

According to paragraph 3, two important things for an effective survey are________.

A properly done samplings and carefully worded questions

B specific questions and an interviewer’s ability to measure respondents’ feelings

C simple questions and a high number of respondents

D understandable questions and a sociologist who is able to interpret the results 

* Đáp án

D

* Hướng dẫn giải

Phương pháp giải:

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