I'm not sure about Oregon but because of the annexation of Texas, in one way caused the Civil War. There was a disruption of power in Congress. it also causes the Mexican American War
Making an inference, the others simply don't make sence. andi took this test b4
Creating a drain on the food,clothing and shelter of American Indians.
Hope it helps :)
Ans: The Institutional Revolutionary Party (Spanish: Partido Revolucionario Institucional; abbr. PRI) is a political party in Mexico that was founded in 1929 and held uninterrupted power in the country for 71 years, from 1929 to 2000, first as the National Revolutionary Party (Spanish: Partido Nacional Revolucionario, PNR), then as the Party of the Mexican Revolution (Spanish: Partido de la Revolución Mexicana, PRM) and finally as the PRI beginning in 1946.
