The true statement about qualitative research is:
Qualitative research utilises probing questions.
Qualitative research focuses on exploring deeper insights, meanings, and experiences, often using open-ended or probing questions to gather rich, descriptive data. The other options are not characteristic of qualitative research: it generally uses smaller sample sizes, does not primarily rely on numerical or statistical analysis, and while it can include descriptive elements, it is not limited to descriptive research alone.