At the end of the Mexican-American War, the United States obtained O the Mexican Cession.
O the Louisiana Territory
O three new slave states.
O the city of Veracruz.

i believe it is the first answer

Explanation:

i looked it up

the democratic and republican parties

explanation:

mount st. helens in washington erupts, causing a massive avalanche and killing 57 people on this day in 1980. ash from the volcanic eruption fell as far away as minnesota. seismic activity at mount st. helens, which is 96 miles south of seattle, began on march 16.