Which statement best explains why the United States grew into a world economic power in the 20th century?
O A. The United States became one of the world's leading importers
and exporters of goods.
B. The United States prevented other countries from abandoning the
gold standard
C. The United States stayed out of major world wars and instead
made economic investments,
D. The United States put effective trade barriers in place to limit trade
with other nations,

I hope this helps

Explanation:

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abraham lincoln  (february 12, 1809  – april 15, 1865) was an american statesman, politician, and lawyer who served as the 16th  president of the united states  from 1861 until  his assassination  in april 1865. lincoln led the nation through the  american civil war, its bloodiest war and its greatest moral, constitutional, and political crisis.[2][3]  he preserved the  union,  abolished slavery, strengthened the  federal government, and modernized  the u.s. economy.