Pork barrel is unnecessary, a project of congressman for their own districts. It is the politicians - senators and their constituents benefited the pork barrel. They include unconnected expenses into bills which are then passed at a higher cost to the people. These projects help them support their voter by feeding money from other projects back into their own district.
I would have to say A) Lewis and Clarke expedition because Lewis and Clarke did explore the Louisiana Territory, The Treaty of Greenville happened before the purchase, and the other 2 had different causes.
La Doctrina Monroe es el principio de la política exterior de Estados Unidos de no permitir la intervención de las potencias europeas en los asuntos internos de los países del hemisferio americano. Derivado de un mensaje al Congreso por el presidente James Monroe el 2 de diciembre de 1823.