Theodore Roosevelt was an imperialist and supported it because he was interested in the US maintaining its power for racial reasons. He believed that the white race was the most dominant over everyone else.
They were looking for the mythical 7 cities of gold which they never found, but they did find the grand canyon and several other famous landmarks
It led to the need to seek agricultural land to grow more food for Europeans.
It created a desire for more cultural exchanges among different racial groups.
Key events:
1918: world war I ends.
1920: nineteenth amendement ratified.
1928: Herbert Hoover elected president.
1929: Stock Market Crash.
1930: Hawley Smoot Tariff passed.
1932: Franklin Roosevelt elected president.
1933: New Deal begins.
Hope this helps.
Answer is
A. Reason
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