A major benefit experienced by west African nations converted to Islam is by the 1300s was? A. euorpen slave traders would leave them alone

B. was between different culture came to an end

C. increased trade with merchants from Islamic areas

D. the bantu migrations southward finally came to an end

C. increased trades with merchants from Islamic areas

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.