Respuesta :

1. The 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.

Sorry  I only know 4

1. The stock market crash of 1929
2. Banking panics and monetary contraction
3. The gold standard.
4. Decreased international lending and tariffs.
Just look the question up and it’ll show you but it’s not giving a five