Answer:
this is my last day so srry and ttyl
Explanation:
One of the main ways in which changes to the railroad helped American industries to grow is that the expansion of the rail system led to increased migration to the west, which led to more farming and agricultural output. Another would be that it led to settlements that ultimately led to business that were able to conduct business over state lines with great ease.
Unterseeboots or U-boats. Both are the German word for submarine.
