I'll give you a question, please answer with step-by-step reasoning process. Where would you find a welcome mat in a house?
Options:
- floors
- desert
- school
- doorway
- bathroom

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
A doorway is an entrance to a room or building.
The answer: doorway.