How did the ice age affect the migration of early peoples of north america? a. many early peoples were forced to stay in one area, which led to the evolution of hunter-gatherer societies. b. the ice age made passage throughout the continent much easier, allowing the evolution of bison and other mammals. c. the ice made most places more livable, so locations such as antarctica could be inhabited. d. many early peoples eventually migrated along the west coast, settling first in the southwest.