A houseboat on Dal Lake has its chimney near the left end of the roof and a small window on the right. Which panel shows the houseboat's reflection?

In the reflection the houseboat is upside down: the hull is on top and the roof and chimney point downwards, with the chimney still on the LEFT and the window on the right: (b). (c) moves the chimney to the right, (a) is the boat itself, and (d) does both.