The main thing is because Britain possessed the factories and other key factors of production. The agricultural and rural societies were transformed into urban and before the Industrial revolution the manufacturing was done in people's home and after that it was largely done in factories and the products were mass produced.
Answer: is it A? Explanation:
In the 1920s, more than 750,000 African Americans left the South--a greater movement of people than had occurred in the Irish potato famine of the 1840s. The large-scale relocation to the Northeast and West brought many other changes with it, as many largely rural people moved into cities for the first time.