Answer:
B. The presence of an unbalanced force(e.g friction) causes a moving object to stop.
Explanation:
As the friction is that force that can stop the sled upon reaching the levelled surface so the option b is correct.
There are none on the list you included with your question.
It depends on how fast you are going and in orincipal no
Do 25-14 and you will get your answer
