Which one of the following is a data collection method?

The interview is a data collection method, gathering information directly from respondents.

Opinion is a form of response content, not a method of collecting data.

Positivism is a philosophy of science holding that knowledge rests on observable facts.

Empiricism is an epistemology stressing knowledge from sensory experience.

Only the interview names an actual technique for obtaining data.

Interviews may be structured, semi-structured or unstructured in form.