A 3x3 matrix is presented. Each cell contains a primary shape. The pattern progresses logically across the rows and down the columns. Which of the answer choices correctly completes the matrix in the bottom-right cell?
Row 1: [Circle with horizontal line], [Circle with vertical line], [Circle with horizontal and vertical lines]
Row 2: [Square with horizontal line], [Square with vertical line], [Square with horizontal and vertical lines]
Row 3: [Triangle with horizontal line], [Triangle with vertical line], [?]
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A
A square with a vertical line
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B
A triangle with a horizontal line
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C
A triangle with horizontal and vertical lines
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D
A circle with a diagonal line