How did Machiavelli’s idea of a good ruler differ from that of medieval philosophers?

Medieval philosophers believed a ruler should be most concerned with taking over other countries; Machiavelli argued that a ruler should only worry about his own country. ... Medieval philosophers believed a ruler should be ruthless and fearless; Machiavelli believed leaders should be compassionate and kind above all else.

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.