A researcher studying literacy rates in rural India collects data by personally visiting villages and conducting face-to-face interviews. This approach exemplifies:
A.Primary data collection through direct personal investigation
B.Secondary data collection from census reports
C.Secondary data collection through indirect oral investigation
D.Primary data collection through mailed questionnaires
Explanation:
Direct personal investigation involves the investigator collecting data firsthand through direct interaction with respondents, which is a method of primary data collection.
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