Answer:
They interfered with efforts to hold government officials accountable to constituents.
Explanation:
Before the dismantling of the political machines, the elected politician would usually just want to make life better for the ones who elected them. Many times, not even that. In political machines, there is a so called party whip structure with the boss or a few autocrats at the top. Only that was important and nothing more.
People started migrating to the cities because the cities provided the people with better opportunities to lead a prosperous life.
December 14, 1799 was when George Washington died.
