Discussion
The advantages of ............. is that it avoids reinventing the wheel of research work.
Answer: B
The answer is Review of literature.
A literature review shows what earlier studies have already found and how. The researcher can then build on that work, identify the gap to be filled and avoid repeating research already done, which is what 'avoiding reinventing the wheel' means.
Sampling selects respondents, and objectives and hypotheses state what the study will do; none of them tells the researcher what has already been done.
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