Which of the following is NOT a cause of the Civil War? A. Slavery and the Abolitionist movement
B. States' Rights and the Nullification Crisis
C. Regional differences between the states including economics and the social experiences.
D. Native American territory around the East coast and a gold rush.

D

Explanation: The gold rush wasn't a cause of the civil war :)

explanation:

the addition to geographic boundaries that might have  kept the people of the huang river civilization from traveling to far distance region is that they had learned about the other river valley civilizations but feared contact would bring invasion.

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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.