What makes st. augustine a particularly notable spanish settlement and is it undisputable?

St. Augustine is the oldest occupied city of the United States. It was found in 1565 by Pedro Menéndez de Avilés. The fort defended the trade route between Spain and its colonies. It would also defend the Spanish-claimed land against invasion.

In 1692 the Queen ordered to build a stronger fort, replacing a wood one with a shell stone one. It was used as a refugee for Loyalists to the Crown during the American revolution, served as a prison during the Indian wars, and was a battle site during the Civil War. And it still stands, so it's pretty much indisputable.

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.