C. The Upper Class
In other words, those with money and controlling production.
The answer is Kennedy
Kennedy approved the backing of the South Vietnamese in their Civil War.
The idea is known as the Republican form. The idea is that people democratically elect those who would represent them in a government, and those people would be held accountable for what they've done if they do something opposite to the will of the people. It's the only way that a democracy can work properly because others would be impossible with that many people.
The Louisiana Purchase and the Lewis & Clark Expedition and its “Sea-coasts, or Inland Countries; Course and Junctions of Rivers and First, Jefferson was eager to push western exploration and American claims It is also questionable how firmly the expedition reinforced the nation's claim to the Oregon territory.
THE answer is C.