D.)

Case studies are in essence external detailed investigations of an individual, group or an institution. (MODULE R14.QUALITATIVE RESEARCH) As a method it enables the researcher to uncover and explore variables and factors that each individual case study reveals -- and this in turn adds to the overall perception and understanding of the topic or issue under investigation. Case studies also differ from more statistical and quantifiable methods of inquiry in that "…the focus of attention is the individual case and not the whole population of cases" (MODULE R14.QUALITATIVE RESEARCH).

From a more philosophical viewpoint, the case study is more open-ended and less dependent on a research methodology that focus on a limited or "bounded system." A central aspect of this method is that content and case studies have the particular advantage of focusing on any system or issue in its natural context or habitat. (MODULE R14.QUALITATIVE RESEARCH)

The case...
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