Which of the following research ideas will be best for using a cross- sectional research design? To see the effect of access to fast internet on academic performance of school children O To see the prevalence of fast internet users among private university students. O To see the academic outcome of online teaching verses face to face teaching O To see health outcome of eating organic food versus genetically modified food. fa researcher wishes to see the effect of an intervention, which of the following would be the research design of choice? O Experimental study O Observational study O Qualitative study Mixed methods

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