The two major ways a person can become a legal u. s. citizen are

Birthright citizenship and naturalization.

Citizenship is a particular status a person has within a territory. This condition gives them specific rights and responsibilities.

The citizenship clause of the Fourteenth Amendment states that there are two main ways in which a person can acquire legal citizenship in the U.S.:

they had freedom from the government and from the affairs

the answer your looking for is c. : )