5- How did America gain some territories? a) The US gained some territories by borrowing money.
b) The US gained some territories by the treaty or war.
c) The US gained some territories by selling Louisiana land.​

c) The US gained some territories by selling Louisiana land.

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.

the correct answer is: the fact that the anti-federalist papers were considered poorly written.