The arrival of railroads was the most far-reaching development in the transportation revolution of the early 1800s. The correct answer is B.
The Peloponnesian War started between a conflict against the Athens and Greeks.
The Mongol Empire lasted only 100 years.
The Mali Empire lasted a little more than 300 years.
Answer:
built mill towns to house their employees as did the US.
I think it's D. The use of farming to feed a larger population.
