Answer:
b) She stopped to change a flat tire.
Explanation:
I'm assuming the y-axis of the graph says distance.
Over time, Anita did not move at all which indicates that she stopped. There is nothing to do with speed in this question do you can take out answers a) and d). c) is pretty irrelevant because why would Anita continue riding her bike after if she already won. So the answer is b) She stopped to change a flat tire.
Hope this helped! :)