The first classmate’s sampling approach is appropriate, as they are discussing a general concept that does not require a specific sample size for evaluation. The students developed a question that could be searched based on information given and used keywords to develop a strategy for finding related articles in academic journals or other sources. They read several articles relevant to their topic and synthesised their contents into their response. The nature of the question made this approach appropriate. It ensured all the information was up to date and accurate.
The second classmate’s sampling approach is also appropriate, as they consulted several textbooks that addressed possible differential diagnoses for certain symptoms in order to further inform their answer about diagnostic workup for an individual patient presenting with certain signs and symptoms. You can also see that they used multiple references to confirm the accuracy of the information in your response.