Why were river systems important in supporting early civilizations and in them flourish?

a. they provided transportation to import food.
b. they were the only source of food for early civilizations.
c. they provided water for irrigation and agriculture.
d. they were natural barriers which prevent attacks.

I believe its C.

Explanation:

Water wasn't there only source of food because they were hunters and gatherers. They caught game( squirrels, rabbits, and other animals). Because this is early civilization they were figuring out how to use crops for food. So C should be the answer.

prime rate/ credit history apex

world war i had a devastating effect on german-americans and their cultural heritage. up until that point   german-americans, as a group, had been spared much of the discrimination, abuse, rejection, collective mistrust experienced by so many different racial and ethnic groups in the history of the united states. indeed, over the years, they had been viewed as a well integrated and esteemed part of american society. all of this change with the outbreak of war.