Turn an EE interest into a focused research question

A student has the broad EE interest "whether vitamin C changes during juice storage". Choose the route that turns it into a focused research question without writing the question for them. Select the research-question focus, subject terms, research method, and question boundary. Then answer this in your own words: why would this route keep the EE research process focused and authentic? AI will analyse your reasoning, evidence, research judgement, documentation, reflection quality, and expression.