Answer:
After initial Persian victories, the Persians were eventually defeated, both at sea and on land. The wars with the Persians had a great effect on ancient Greeks. The Athenian Acropolis was destroyed by the Persians, but the Athenian response was to build the beautiful buildings whose ruins we can still see today.
D: completed a citizenship process
After serving in the military, even for 5 years, you still have to apply for naturalization and get approved in order to naturalize through military work. You must also meet a lot of requirements beyond your military service to be eligible.
There is no citizenship contest.
Being born in the United States automatically makes you a citizen, you do not need to be naturalized.
D is the only answer that upon completion makes you a naturalized citizen because you have gone through the process of naturalization.
