Explain the Post War Panic and some events that were caused from it

This resulted in a five year depression. The panic of 1873 was a result of over-expansion in the industry and the railroads and a drop in European demand for American farm products and a drop off of European investment in the US.

Explanation:

i believe the correct answer is option b. most eastern european nations joined nato.

though i could be wrong, option d. the eastern european nations were granted complete independence, would be another choice.

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