What could cause a driving car to stop?
Options:
- on time
- pollution
- death
- sickness
- run out of gas
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
Car requires gas to run. Car gets stops if run out of gas. The final answer: run out of gas.