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

Multiple Choice

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

A) Presenting the candles standing up on end
B) Presenting the matches and tacks outside of their respective boxes
C) Presenting the tacks in the match box and the matches in the tack box
D) Presenting some other type of material,like buttons,in one of the boxes