Answer:
B. The development of new, more affordable methods of Transportation
Explanation:
In the Late-nineteenth-century transoceanic labor movement from one region to the other were most directly facilitated by the evolution of new, cheap method of transportation.
The labour movement or can also be refer to as labor movement are mostly embarked on due to search for greener pastures which includes: good wages, better working conditions among others.
For instance, in the late eighteenth and early nineteenth centuries the Great Britain development of the British own factories were the pioneer to use steam-powered machines for large-scale economic production, this will leads to increase in the movement of labour to the region.
Answer: The event that triggered war came at Fort Sumter in Charleston Bay on April 12, 1861. Claiming this United States fort as their own, the Confederate army on that day opened fire on the federal garrison and forced it to lower the American flag in surrender.
A lot of the events of bleeding Kansas took place because during the time the state was going through the process of becoming a slave free state
I am for sure it is B. economies