The Ice Age in the Americas:
a. Made it easier for humans to migrate westward from Alaska.
b. Probably prevented southward migration over land until a pathway was cleared across the area of modern Alberta.
c. Prevented migration over water or by rafts, canoes, or boats because of the ice.
d. Resulted in the inhabitants of the Americas having remarkably similar languages and mitochondrial DNA.
b. Probably prevented southward migration over land until a pathway was cleared across the area of modern Alberta.
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