It can be inferred from the passage that one reason that sociologists may become frustrated with questionnaires is that
A.respondents are too eager to supplement questions with their own opinions
B.questionnaires are expensive and difficult to distribute
C.respondents often do not complete and return questionnaires
D.questionnaires are often difficult to read
A.respondents are too eager to supplement questions with their own opinions
B.questionnaires are expensive and difficult to distribute
C.respondents often do not complete and return questionnaires
D.questionnaires are often difficult to read
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Hóa Học lớp 12
