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Progressives sought to

Abreak the power of the bosses by reforming the election process.
Bestablish a voting system that used different colored ballots for each party.
Callow city managers to run cities as they might run a business.
Drename the Executive Mansion the White House.

Verified Answer :

Progressives sought to "a. break the power of the bosses by reforming the election process", since one of the main goal of the progressives was to make things more fair for consumers and "average people". 

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