2 guides on this topic
Data mining
What each data mining question is really asking, how to structure the answer, and where the marks are likely to sit.
The technique you would refuse is the part that shows understanding, because rejecting one on principled grounds means you know what each technique assumes about your data.
Define clustering in data mining and explain some of its characteristics, in at least 150 words, supported by at least one peer-reviewed scholarly journal reference.