After modern humans left their place of origin where did they migrate to

From Africa to Eurasia between roughly 1.8 to 0.5 million years ago

modern humans migrated out of Africa after their emergence at 300,000 to 200,000 years ago, the migration of archaic humans from Africa to Eurasia between roughly 1.8 to .5 million years ago.

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.

they wanted the u.s. to fight on the side of the central powers.