when referring to a person born outside the US to parents who are US citizens and who is granted automatic US citizenship?

The person outside is still a us citizen.

Explanation:

A person born abroad in wedlock to a U.S. citizen mother and a U.S. citizen father acquires U.S. citizenship at birth under section 301(c) of the Immigration and Nationality Act (INA), if at least one of the parents resided in the United States or one of its outlying possessions prior to the person's birth.

i think the answer is c, rivers.

explanation:

sometimes, borders fall along natural boundaries like rivers or mountain ranges. for example, the boundary between france and spain follows the crest of the pyrenees mountains. for part of its length, the boundary between the united states and mexico follows a river called the rio grande. the borders of four countries divide africa’s lake chad: niger, chad, cameroon, and nigeria.