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Answer:

The stock market crash of 1929. During the 1920s the U.S. stock market underwent a historic expansion.

Banking panics and monetary contraction.

The gold standard.

Decreased international lending and tariffs.

Answer:

1. hereThe stock market crash of 1929. During the 1920s the U.S. stock market underwent a historic expansion. ...

2. Banking panics and monetary contraction. ...

3. The gold standard. ...

4. Decreased international lending and tariffs.

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