Select the sentence that logically completes the following passage:

“Qualitative research often prioritises depth over breadth. Unlike large-scale surveys that aim for statistical generalisability, ethnographic studies typically focus on a small number of cases. _____”

The passage says that qualitative research focuses on depth and on a small number of cases. This means its strength is detailed understanding and context.

• Option 1 is incorrect because qualitative studies usually do not require larger sample sizes.
• Option 2 is incorrect because qualitative findings can still be influenced by researcher bias.
• Option 4 is incorrect because qualitative research is often more time-consuming.
• Option 3 logically follows from the idea of depth and contextual understanding.