What is the one thing you cannot do if you're on the move?
Options:
- sit still
- stationary
- running
- stand still
- stay still
Let's think carefully first. Step-by-step reasoning process:

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
When oen is moving, they cannot stand still. Stand still means there is no movement. So the final answer is stand still.