Documentary research relies heavily on existing documents and records rather than collecting primary data directly from respondents. It includes the systematic analysis of sources like government statistics, institutional reports and archival materials. The researcher interprets these documents to answer research questions. Since the stem refers to studies based on existing records such as census data, documentary research is the correct term.
Option A:
Field research involves going directly into natural settings such as schools, communities or organisations to collect primary data through observation, interviews or surveys. It is not primarily based on analysing existing official documents. Therefore, field research does not match the situation described in the question.
Option B:
Documentary research systematically selects, evaluates and interprets written or recorded materials as data. It is especially useful when historical trends or large-scale patterns must be understood without new field data collection. Because the stem focuses on using census data and institutional reports, documentary is the best completion.
Option C:
Experimental research manipulates one or more independent variables under controlled conditions to observe their effect on dependent variables. It typically requires planning interventions and collecting new data rather than relying solely on existing documents. Hence, experimental research is not the appropriate answer.
Option D:
Action research is practitioner-oriented and seeks to solve immediate problems in a local context through cycles of planning, acting, observing and reflecting. Although it may consult documents, it is not defined by primary reliance on official records. Thus, action research does not fit the description in the stem.
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