Answer:
D. A citizen of another country who is visiting the United States on vacation
Explanation: they are obviously a citizen of another country and not Americans. They are just on a visit not permanently staying. you still consider all the other as citizens.
A- There is a law in United State that said a child born on United States land atomically is American Citizen
B- That person who was born on American soil and now overseas can choose whether or not to change his/her citizenship or to keep it.
C- That person is an American and something else. He is both. That doesnt make him non American. Just mean he is both.
The country that faced a unity crisis due to having a large variety of ethnic groups was D.)Austria-Hungary.
<h3>Which groups were in Austria-Hungary?</h3>
Austria-Hungary was an empire that comprised of several ethnic groups including Serbs, Bosnians, Croats, Hungarians, and Austrians.
These groups wanted independence for themselves and this led to a lot of strife in the empire.
Find out more on Austria-Hungary at brainly.com/question/24213561
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Germany's resumption of unrestricted submarine warfare
An advantage is that it takes way less time to do it than to create a formal treaty since the President would not need consent from the congress for an executive agreement. A formal treaty can, however, last longer because it is more difficult to cancel, so if it's good, then it is also safer for it to be formal.
