What was the main source of food for all of the plains Native American groups A fish B deer C buffalo D alligator

C. Buffalo is your correct answer.

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although world war i began in 1914, the united states did not join the war until 1917. the additional firepower, resources, and soldiers of the u.s. to tip the balance of the war in favor of the allies. remaining neutral. when war broke out in 1914, the united states had a policy of neutrality.