What caused the great economic inequality between the rich and poor during the Progressive Era? People who remained on farms were stuck in poverty.
Urban factory workers had to live in crowded tenements.
Business owners did not share profits with their employees.
There was a large wave of people emigrating from poorer countries.

i think it is the last one: There was a large wave of people emigrating from poorer countries.

Explanation:

im so sorry if it is wrong.

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b) the importance and limits of political power.

the main reason the us senate rejected the treaty of versailles was because "european nations wanted to punish germany"

d(:

me and mark as brainliest.