imagine you are assigned to give a speech about how the US economy has significantly changed in the past 200 years. Which US historical event would be most effective to reference in your speech?
flooding of New Orleans, Louisiana, after Hurricane Katrina
discovery of gold in California and the arrival of prospectors
development of urban sprawl around major metropolitan areas
transformation of Midwest industrial towns into the Rust Belt
overthrow of the Hawaiian monarchy and the US annex of Hawaii

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