hi there!
I believe the correct answer is C. Because the common characteristic of these mechanisms is that they all place more <u>power directly in the hands of voters, </u>as opposed to elected representatives. Direct democracy is therefore often seen as conflicting with representative democracy, in which voters elect representatives to make decisions on their behalf.
I think that would be Voting, though I am not positively sure.
The result was that tariffs were lowered which bothered lobbyists but had great support from the public. The trusts were slowly beginning to end because of the Federal Trade Commission Act of 1914 and Clayton Anti-Trust Act of 1914 that was meant to end monopolies in businesses. The banks were reformed with the Federal Reserve Act of 1913 which is still used today, only modified.