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Optical Illusion Quiz
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In the Zöllner illusion, what causes the long, perfectly parallel diagonal lines to appear unparallel and tilted?
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50-50
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Audience
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A
Short, intersecting cross-hatch lines drawn at an angle
B
A background gradient shifting from black to white
C
The use of contrasting neon colors at the intersections
D
The curved shape of the frame surrounding the lines
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