D. The poor living conditions of the working class in industrial cities
Explanation:
Lincoln Steffens is remembered for his work on the corruption and the life of working class in industrial America which he compiled in his book called the Shame of the City.
It delved into the deep seated corruption and systemic exploitation which was rampant in the big industries of the country which were booming with profits but were designed to exploit the common man.
His study on the exploitation on the working class was instrumental in getting more worker rights for them.
I think it’s a or c sorry if it’s wrongs
American settlers, Native Americans, and Mexican Americans faced some conflicts in the Mexico cession. They all faced legal, economic, and social discrimination problems.
In short, conflicts over land and water.
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He showed that the people were not as free to conduct whatever deeds they wanted and that the federal government was still in charge and that laws would have to be obeyed or people would be punished if they broke the laws. He also showed that the government will only meddle in such affairs reasonably and not be tyrannical.
This was shown through active confrontation with the people who thought they could do what they wanted. For example, during the progressive age Roosevelt engaged in breaking monopolies and trusts which didn't include physical violence but did include breaking unjust treatment of the country and exploitation of laws.
