The last Ice Age may have helped early gatherer-hunters in which of the following ways?
a. The heavier rainfall of the Ice Age's weather fluctuations made it possible for them to grow crops.
b. Ice served as an important preservative for food, making it possible for them to settle in the same place for extended periods.
c. The cold weather killed off most large mammals that had been predatory on early human beings.
d. The lower sea levels associated with the Ice Age created land bridges, allowing human beings to travel to many regions of the earth.
Answer: d. The lower sea levels associated with the Ice Age created land bridges, allowing human beings to travel to many regions of the earth.
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