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In which of the following scenarios may a person gain U.S. citizenship by naturalization?
a. A person is born on a U.S. military base
b. A person with no connection to the U.S. immigrates to the United States
c. A person is born in an American territory
d. Two U.S. citizens have a child on American soil
b. A person with no connection to the U.S. immigrates to the United States