All the following are true of the Mexican-American War and its aftermath EXCEPT

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1 point
the US gained California right as a gold rush was beginining in 1848.
it led to an outbreak of nationalism and the desire to expand into more lands
the US gained almost 50% of Mexico's territory
it led to the Wilmot-Provisio which didn't pass but demonstrated efforts to stop the spread of slavery into the region

the US gained almost 50% of Mexico's territory.