Answer:
Hey there!
I think the answer is A. Security. As America was expanding, people went to the west for more jobs, (opportunity) and more land. Thus, they were more free to do what they wanted.
Hope this helps :)
they were both fighting for the same land
The awnser is becasue the nations were united
It would be "party leadership" that is the most common party system in the world today, although it should be noted that there are still many unitary and dictatorship-based governments.
