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9 January, 21:52

The graph below shows the United States' gross domestic product (GDP) during the 1920s:

Which statement explains the cause-and-effect relationship between government policies in the 1920s and the rise in gross domestic product?

1[Regulations against collective bargaining kept wages low.

2[Regulations prohibited the importation of inferior products.

3[High tariffs allowed domestic production to expand with little competition.

4[High tariffs created beneficial conditions for exports to foreign market