Answer:
A or B
Explanation:
I can't see the lines that your question mentions but the rich farmland is what attracted settlers to Oregon. The gold rush was in California, and the only huge thing that was discovered in 1849 (option D) is the gold rush, no mention of an oil boom.
Extreme pro-slavery elements objected to it because it provided a precedent by which Congress had power to regulate slavery. Abolitionists opposed it because it allowed slavery to continue to spread in some of the areas.
Answer: Uh, I think it was the Black panthers but dont quote me on this.
Pretty sure the answers are A and <span>C.
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