What injustices did many muckrakers focus on?
SELECT AN ANSWER
Muckrakers particularly focused on
government to make sure that the US
courts were being run honestly.
Muckrakers focused on weaker groups,
like children or blacks, to alert people to
their plight.
Muckrakers focused on the plight of
wealthy businessmen who lost money
when immigrants flocked into cities.
Muckrakers exposed US newspapers for
being focused on sensational reporting.

Explanation:

The muckrakers played a highly visible role during the Progressive Era. Muckraking magazines—notably McClure's of the publisher S. S. McClure—took on corporate monopolies and political machines, while trying to raise public awareness and anger at urban poverty, unsafe working conditions, prostitution, and child labor.

im not sure its either a leader of a group of congresspeople or a person from a congressmans district

sorry im not sure