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Which of the following statements is true?

I. A well-designed survey asks questions using the same wording for all of its subjects.

II. A well-designed survey uses volunteers to make sure that the survey is not an inconvenience for respondents.

III. A well-designed survey does not need to use a sample that is representative of the intended population as long as the sample size is large enough.


I only.


II only.


III only.


I and III only.


II and III only.

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