Soviet Union and the United States
Explanation:
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Ghettos in Germany first were areas to contain Jews, but eventually those people also fed the concentration camps
John hay negotiate to establish open door policy with: China and the countries with spheres of influence.
At that time, john hay believe that establishing open door policy with these countries would bring economic wealth to united states. Under this policy, United states would be able to trade with china and those other countries without many restrictions such as tariff or quota. This would bring more profit to american producers.