Which statement best explains why the United States grew into a world economic power in the 20th century?
A. The United States put effective trade barriers in place to limit trade
with other nations.
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 benefited from investments in manufacturing
and technology

D. The United States benefited from investments in manufacturing

and technology.

Explanation:

The first was to gain trade partners on favorable terms partners that could supply natural  resources the United States could not, such as sugar, rubber, and coffee. The  second was to establish naval bases. The third was simply to prove to the world  that the United States was a great power a force other nations would have to  reckon with. These three reasons explain why the United States grew into a world power.

d

Explanation:

the old way of life was represented by superstition, an angry god, and absolute submission to authority. the thinkers of the age of reason ushered in a new way of thinking. this new way championed the accomplishments of humankind. individuals did not have to accept despair. science and reason could bring happiness and progress. kings did not rule by divine right. they had an obligation to their subjects. europeans pondered the implications for nearly a century. americans put them into practice first.