Which option replaces the question mark?

First, analyze the transformation in the top row. The large triangle rotates 90 degrees clockwise (from pointing up to pointing right). Simultaneously, the small white triangle becomes a filled black triangle.

Next, apply this same rule to the bottom row. The large tall rectangle should rotate 90 degrees clockwise, becoming a wide horizontal rectangle. Finally, the small white rectangle should become a filled black rectangle.

Therefore, the correct image shows a wide rectangle with vertical stripes and a small black rectangle next to it.