Answer:
C. The physical topography of a mountainous region
Step-by-step explanation:
When two tectonic plates are moving and colliding with one another, it might caused the land on top of them to be warped upward and folded into what we commonly sees as mountains or hills.
(you can do a self-experiment to understand how this works. Grab two piece of papers and start colliding it with one another. Sometimes, the collision will cause the paper to be folded upward, just like a mountain)
But the formation of mountain from this movement do not happen in an instant. It could take millions of years for a mountain could be formed.