Progressives sought to
a. break the power of the bosses by reforming the election process.
b. establish a voting system that used different colored ballots for each party.
c. allow city managers to run cities as they might run a business.
d. rename the Executive Mansion the White House.
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".