I'm assuming you're asking for synonyms for arguments. Here are as man as I can think of: disagreement, fight, feud, clash, and dispute.
3) Popular Sovereignty
4) Harriet Beecher Stowe (I don't know if this is the author you are looking for)
5) Uncle Tom's Cabin; or, Life Among the Lowly ( I don't know if this is the book you're looking for)
6) Free-Soil Party (Free Land)
7) Henry Clay
I hope I helped ^.^
Answer:
The answer should be C, This is because sending spies helped them as they could represent themselves as farmers i suppose.
They slowed the productions of arms and as well got help from other allied country's
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