What will criminals do before robbing a bank?
Options:
- step lightly
- serving time
- take money
- arm themselves
- manual
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
Robbing a bank needs some arm weapons to threaten people so criminals arm themselves before robbing. The final answer: arm themselves.