Answer:
A. Many people moved from rural areas to urban centers,
Step-by-step explanation:
During the late 1800s the flow of people from rural areas to urban was maximum. At this age there were lots of big industries being built and run during industrialisation phase so people went to urban areas for the jobs.
As the large portion of population couldn’t depend upon the agriculture in rural areas hence they migrated to the cities seeking the jobs and opportunities.