In reference to this figure, we tend to see an illusory contour of a triangle created by the figure. What is true about this figure? 
A. There appears to be a series of blue contours, which are not actually present.
B. There appears to be a white triangle, which is brighter than the white background.
C. The white figure appears to move, even though that is not possible.
D. The blue figures appear to be concave, even though they are convex.
Answer: B
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a. how to swim c. the name of your third grade teacher b. how you celebrated your 10th birthday d. a sonnet you memorized in high school
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Which of the following statements about childhood immunizations is true?
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