Under _________, a well designed questionnaire is mailed to the informants with a request to fill it up and return the same within the specific time schedule.
A
direct personal interview method
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B
mailed questionnaire method
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C
information received from local agencies or correspondents
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D
indirect oral interview method
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Solution
The correct option is B mailed questionnaire method Under mailed questionnaire method, a well designed questionnaire is mailed to the informants
with a request to fill it up and return the same within the specific
time schedule. By this method, a wide range of people can be connected.