Your answer is B. Slavery would be illegal north of the southern border of Missouri.
Answer:
Historians work to understand the circumstances of those living in the historical time period.
Explanation:
All of them are necessary
Germany and Japan both made more aircraft than the US in 1939.The United States was making far more aircraft than Germany and Japan combined by the end of the war.The United States had a huge production advantage by the end of the war.The United States had not fully mobilized for wartime production in 1939.<span>Japan and Germany may have suffered war damage that hurt their production.</span>