Answer:
a) the United States puts effective trade barrier in a place to limit trade with other nations.
b) the United States stayed out of major world war and instead made economic investment.
c) the United States prevented other countries from abandoning the gold standard.
d) the United States became one of the world leading importer and exporter of goods
A because if u look at the other answer they don’t make senced
<span>i believe it was the Harrison narcotics Act.. hope this helps</span>
B - he was one of the first sociologists to systematically apply the methods of science to the study of society
