Where can many merchants have their stores under one roof?
Options:
- supermarket
- store
- mall
- market
- shopping center Hmmm, let me think.

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 mall has multiple shops in it which any merchant can have. A mall has common roof for all stores.
So, the answer is mall.