Use reasoning to lead to the answer of the following question:
I put up a railing to make sure I don't fall at my house, but now when I sit outside it blocks my view, what am I sitting on?\nOptions:\n- deck\n- stairwell\n- house\n- lawn\n- flight of stairs
 Reasoning process:
User
Railing blocks the view that can be seen by sitting on the deck. Deck is made outside the house. Therefore, the final answer is deck.
Assistant