Question 5: According to paragraph 3, two importan...

Câu hỏi: Question 5: 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