There are many influences that could potentially lead a member of the House of Representatives to vote against the wishes of the people in their district. Simply the member could think that their constituents are incorrect in their view or don't possess enough information so therefore, they decide not to vote in accordance with the views of their constituents. Another influence could be that of their political party or the elites in their party that wish for the member to vote a certain a way. Another influence could be special interest groups or lobbies that seek to sway the views of Congress Members. These are all factors that together or separately could make a member of Congress vote in opposition of their constituents views.
on the first Tuesday in November of every fourth year, the people elect the members of the Electoral College. Apportioned by population to the 50 states one for each member of their congressional delegation
Democratic Republics as more than one person is assigned the position of power. This cancels out A and B as an answer since monarchies and totalitarian governments have one single person in power. Parliamentary Democracies is out of the question
