The research method that should be used is a longitudinal study.
In a longitudinal study, researchers, again and again, look at the identical people to hit upon any modifications that would arise over a length of time.
Longitudinal research is a form of correlational study wherein researchers take a look at and gather information on some variables without attempting to persuade the one's variable.
The missing information is given below:
-field study
-longitudinal study
-correlational experiment
-cross-sectional study
hence, The research method that should be used is a longitudinal study.
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