Answer: Explanation is below!
Step-by-step explanation:
The sprinter's velocity and displacement both increased, since the runner is moving forward in a direction. Displacement and Velocity are both vector quantities.
Assuming that the direction in where the runner is running to is positive, we can assume that the displacement is positive ( vise versa for a negative direction)
The more displacement the runner has, the more velocity the runner will have.
Hope this helped! Have a good day ;D