Awarding points and brainliest answer What was the case that determined if it was legal to burn the American flag? (Hint it is not an old law but a law of the 20th century)

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.

go up to your profile picture in the top right hand. click on it. then click on edit profile. there you shall see delete account