Respuesta :
The correct answer is D. From farms to cities
Explanation
During the later 1800s and early 1900s (from 1850 to 1930) in the United States industry was emerging and thus manufacturing of different products such as cars, textiles and garment were growing exponentially, due to this, factories required labor force and job opportunities in the cities were multiple in comparison to those in the countryside, because of this, people who lived on farms in the countryside started going to the cities looking for new opportunities as it was in the cities or near to them where factories were.