These maps show the population density of England at the start of the 18th and 20th

These maps show the population density of England at the start of the 18th and 20th Centuries. Darker colors represent a higher concentration of the population.
What can be concluded from the population density of England during this time period?
A) Families were torn apart due to factory labor.
B) England's population grew during the World Wars.
C) Textile manufacturing was no longer an economic factor.
D) The Industrial Revolution led to the growth of urban areas.