Which of the following is a disadvantage of mailing questionnaire?
A
It cannot be used for collecting data from illiterate people
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B
It is more expensive
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C
There is a high possibility of influencing the responder
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D
None of these
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Solution
The correct option is A It cannot be used for collecting data from illiterate people In order to read and respond to a questionnaire, a respondent should be literate. Hence, it cannot be used by illiterate people.