I'll give you a question, please answer with step-by-step reasoning process. What could you use to store a clock?
Options:
- shelf
- own bedroom
- desk
- wall
- car

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
Shelf is used to store things. Clocks can be stored in a shelf.
The answer: shelf.