In 1840, the population of chicago was only 4,470. by 1900, the city's population was 1,698,575.

which factor contributed most to the population change?

african americans escaping poverty and discrimination in the south
the expansion of chicago's boundaries into surrounding counties
chicago's location as a railroad hub between the east and the west
chicago's improvements in sanitation and health care

“the battle of stalingrad is not a turning point necessarily in strategic terms, because a lot more has to be done before the soviets can be certain of defeating germany,” says renowned world war ii historian richard overy. the germans had fought nearly a thousand miles across the soviet union to get to stalingrad.

food and resources were plentiful.

women were encouraged to marry later in life so they could work in factories.

letter a is the answer