Answer to Question 1
A
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Questions for a meta-analysis are usually narrow, focusing, for example, on a particular type of intervention and specific outcomes. Key constructs should be conceptually definedthe definitions are critical for deciding whether a primary study qualifies for the synthesis. A randomized controlled trial is not a systematic review. Research questions in metasyntheses tend to be broader, so that they can fully capture the phenomenon of interest. The question is researchable.
Answer to Question 2
A