Answer:
Hello! Your answer here is the expansion of railroads. The railway allowed people to flock to cities and allowed people to travel newer places as well. Business boomed due to the railway with the mass increase of people and goods. Railroads answered the need to transport goods quickly to distant markets and to get the goods to ports where they could be taken by ship to even more distant markets overseas; railroads also brought raw materials to ports close to factories.
Answer: B was a significant cause of world war 2
Explanation: Hitler was outraged at the lose of Germany in world war 1 and with the Treaty of Versailles that he started WW2 to end the treaty
Congress passed a law that said that the president had to go through congress to send troops overseas but the president could send troops overseas for 30 days but anything more than that he would have to go through congress
C United States Congress I went on wiki and it talks about congress at the United States Congress