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,