Following the Adoption of Progressive Reforms, What Happened to Voter

Following the adoption of Progressive reforms, what happened to voter turnout in the United States?

A) It increased dramatically because people were able to vote for candidates of different parties.
B) The candidates worked much harder to mobilize voters so voter turnout increased.
C) The various changes combined to produce a significant decrease in voter turnout.
D) There was no appreciable change in voter turnout because the incentive structure really did not change very much.