In Duncker's famous candle problem study of functional fixedness,which of these conditions typically led to a breakthrough and eventual solution?

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Duncker's study found that presenting the tacks in the matchbox and the matches in the tackbox led to a breakthrough and eventual solution of the candle problem. This is because it disrupted participants' functional fixedness and allowed them to consider the boxes as tools to hold other materials, rather than just their intended contents. Presenting the candles standing up on end did not lead to a breakthrough as it only addressed a surface-level issue, while presenting the matches and tacks outside of their respective boxes did not provide a clear solution to the problem. Presenting other materials like buttons would not be relevant to the candle problem.

In Duncker's Famous Candle Problem Study of Functional Fixedness,which of These