When not playing your mandolin, where would you store it?
Options:
- closet
- musical instrument store
- instrument case
- music shop
- music store
Please answer and provide answer explanation.

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
Instrument case is the box in which instrument is kept. Mandolin will be stored safely in its case. The final answer: instrument case.