Answer: I think its D) Popular Sovereignty
Explanation:
A.
<span>Its location made it difficult to defend the Eastern Roman empire. </span>
To constrict the power of the government and give more freedom to the people
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The following are the answers to the questions posted.
9.D
10.B
11.D
12.D
13.B
=> at first, Lincoln proposed 10% but he felt it will cause issues with the South rejoining the Union.
14.D
15.B
16.C.
=> McClellan was running as a Democrat securing the Southern votes.
17.D
18.B
19.A
=> Lincoln is a Republican. He defeated John C. Breckinridge, Democrat Stephen A. Douglas, the candidate of the Constitutional Union, John Bell, who are Sounthern Democrat.
20. A</span>