Answer:
Instead of coming to terms with each other in a suitable fashion, sectionalism drove each person to be "a member of their state", instead of being a "american". This led to conflicting interests, which boiled down to war. Each person went to war for reasons of their state, instead of what Lincoln wanted, the preservation of the Union.
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I believe the answer to this is C.
The middle east is almost entirely surrounded by seas. The sea bordering the Middle East is the Caspian sea.
lords: military service & loyalty
vassals: protection & fief
