Historians claim Stalingrad was possibly the most important turning point battle in Europe, because it “opened up an Eastern Front.” Explain what this means.

explanation:

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answer is b.

  it is always the best policy to have good communication and good relations between individuals and, specially, between leaders of the countries. for this purpose, among others, there is a common place, the united nations, where the representants can present his and learn about the other country's policies.