Question

how did industrial technology impact cities at the turn of the twentieth century?
cities became dirtier and more unsanitary as migration increased the population density.
even the working class could afford a spacious apartment because of decreased building costs.
the introduction of cars allowed people to move about more freely.
new water and sewage systems and electricity made cities more livable.

Explanation:

At the turn - of the twentieth century, industrial technology led to urbanization and population growth. New water, sewage, and electricity systems were part of the technological advancements that improved living conditions in cities. While population density did increase due to migration, the focus here is on the positive impacts of industrial - era technology. Cars were not the main industrial technology impact on cities at this time in the context of the question, and working - class affordability of spacious apartments was not a common result.

Answer:

New water and sewage systems and electricity made cities more livable.