A fisherman's hut stands on stilts in the backwaters, with a blue window on the right and a ladder leaning down on the left. Which panel shows the hut's reflection?

The reflection is upside down: the red roof is at the bottom and the stilts point up. Left and right do not change, so the window stays on the right and the ladder on the left: (b). (a) swaps window and ladder, (c) is the hut itself and (d) is upside down AND swapped.