Answer:
There were many causes of the Civil War. Some were The Northwest Ordinance, The Compromise of 1850, Kansas VS Nebraska (Bleeding Kansas), The Missouri Compromise, ect. The Civil War was mostly caused because of slavery. The north were against slavery, the south thought they should have Popular Sovereignty (the people chose if they wanted slaves).
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The Munich Pact was an example of awful foreign policy, which allowed Hitler to annex Czechoslovakia.
I believe that the first one is A because Historiography means the study of history.