A 3x3 grid is presented. The top row contains: [A square with a small black circle in the top-left corner], [A square with a small black circle in the top-right corner], [A square with a small black circle in the bottom-right corner]. The middle row contains: [A triangle with a small black circle in the top-left corner], [A triangle with a small black circle in the top-right corner], [A triangle with a small black circle in the bottom-right corner]. The bottom row contains: [A circle with a small black circle in the top-left corner], [A circle with a small black circle in the top-right corner], [A missing square]. Which of the options below completes the grid?
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A
A circle with a small black circle in the bottom-left corner
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B
A square with a small black circle in the bottom-right corner
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C
A circle with a small black circle in the bottom-right corner
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D
A triangle with a small black circle in the bottom-left corner