Well a finnish war happened and the act probibiting importaion of laves also happened
↓
<em>What forms the boundary between the North Central Plains and the Coastal Plains?</em>
Answer:
Hi, There!
The Correct Answer Is option C Or Caprock Escarpment!
Hope this Helps!!

The reason we joined in world war one was due to the germans sinking merchant ships that had US citizens on them and they were also sinking some of our own ships. Due to that President Wilson involved us in the war.
He used diplomatic maneuvering alliances to increase French territory and centralize its government.