1. Adolf Hitler establishes the Third Reich-<em>1933</em>
2. Germany annexes Austria-<em>March 12, 1938</em>
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3. Munich Conference/German annexation of Sudetenland-<em>September 29, 1938</em>
4. Germany invades Poland-<em>September 1, 1939</em>
5. Great Britain and France declare war on Germany-<em>September 3, 1939</em>
6. Germany and the Soviet Union establish the Nazi-Soviet Pact-<em>February 11, 1940</em>
3. The third one.
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Answer: I was a preventative mesuare against polio
Explanation:
Polio is a virus that caused muscle weakness. Although most people fully recover it became a big problem in the US. That is what the vaccine was created. You could say it saved America.
Georgia's industries have mainly relied on immigrants to help D) keep costs down.
Hope this helps! :)