Tea Act of 1773, which caused the boston tea party in the same year leading up to a war 2 years later.
I believe it's quadratic, as quadratic matches the second time while linear matches the first time you find the differences.
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.
