The correct answer for this question would be option D. Translation 4 units up. The figure that shows a reflection of pre-image QRS over the line t is translation 4 units up. The explanation for this is that, when an image reflect across the line, it's become the mirror image but not totally necessary that it is the same. And if you move the figure 4 units up, it will be on top of it. Hope this answer helps.
