In a Figure Classification task, four figures are shown: a pentagon, a hexagon, an octagon, and a triangle. Which is the most logical classification rule?
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A
The triangle has fewer sides than 4, while all others have more than 4 sides
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B
Pentagons, hexagons, and octagons are all curved; the triangle is straight
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C
All four figures belong to the same group because they are closed shapes
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D
The octagon is the odd one out because it has the most sides