What was the greatest challenge cities faced as a result of rapid industrialization in the 1800s?
attracting skilled laborers to work in new and developing factories
convincing factory owners to move their businesses to the cities
establishing shipping for raw materials and manufactured goods
providing enough city services to protect and support new citizens

The greatest challenge cities faced as a result of rapid industrialization in the 1800s was providing enough city services to protect and support new citizens. Option D is correct.

As a result of rapid industrialization in the 1800s there was a dramatic increase in the number of the people from rural areas moving into the cities to find a better life where industries where located. Machines replaced hand labour as the main means of manufacturing, increasing the production capacity of industry tremendously.

mass production/ assembly line production

d.

the northwest territory became the most densely populated area in the u.s.