<span>I'm not sure I
completely understand what the question is asking for. When I look at
the plates, it looks like they all fit together like a giant puzzle.
They separated due to tectonic plates shifting over hundreds of years.
This was based on the theory that there was a supercontinent (one giant
landmass). I'm not sure how much this helps, but I hope it does. Good
luck!!
</span>
I think its A but I'm not positive about this one.
Answer:
The midpoint of the question is 4
Answer:
I am pretty sure it is the Missouri River.