How did the changing boundaries of the U. S. impact both foreign and domestic policy? Explain/example

Do you think the U. S. has done well in following
the policy stated in the Monroe Doctrine, provide example/ explain

yellow fever and other tropical diseases

explanation:

japan participated in world war i from 1914 to 1918 in an alliance with entente powers and played an important role in securing the sea lanes in the west pacific and indian oceans against the imperial german navy as the member of the allies.

d and a is the correct anwsers

explanation:

no every country is held to the same degree as others just some member countries such as the usa and germany are more economically sound so the need to show there support to all others