Which Grid Completes the Pattern?

Study the 3×3 matrix carefully. Each small grid contains a different arrangement of black squares, and the patterns change systematically across the rows and columns. One grid is missing from the bottom-right corner. Identify how the number and positions of the black squares progress through the matrix, then determine which option correctly completes the pattern. Which answer — A, B, C, D, E, or F — should replace the question mark?