I think B preventing nuclear war
Answer: because Texas allowed slavery, Northerners were opposed to allowing another slave state into the union.
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Answer:
Through nonviolent protest, the civil rights movement of the 1950s and '60s broke the pattern of public facilities' being segregated by “race” in the South and achieved the most important breakthrough in equal-rights legislation for African Americans since the Reconstruction period (1865–77).
Answer:
In 1838 and 1839, as part of Andrew Jackson's Indian removal policy, the Cherokee nation was forced to give up its lands east of the Mississippi River and to migrate to an area in present-day Oklahoma. The Cherokee people called this journey the "Trail of Tears," because of its devastating effects.
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