40 points can modern nations learn from the ming dynasty? (your answer should be three to five sentences in length.) consider all the mistakes the ming made in terms of trading and outside relationship with other nations.

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.

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