The correct responses for how one can become a citizen are:
- A person is born in the United States.
- A person of foreign birth successfully completes the naturalization process.
(Note: "A person of foreign birth is granted citizenship after living in the U.S. for five years." is not entirely accurate without specifying that they must also go through the naturalization process, and "A person marries someone who is already a U.S. citizen." typically leads to a quicker path to citizenship but does not guarantee it without completing the necessary application and process.)