Explanation:
C Between the Tigris and Euphrates rivers
A. The laws passed by the U.S. Senate
There was tension in the politics of the nation which were largely due to differences in the economies of the North and the South. For the South, slavery was used as a labor source hence they supported slavery. The North on the other hand was opposed to slavery as it was largely urbanized. Different regions led to the creations of different economies.
Answer:
to advancements in print and communication
