Question

By the end of the Ice Age, there may have been___________ humans, or _________________.
a. 10 million, one person for every 5 square miles of land surface.
b. 100 million, one person for every 100 square miles of land surface.
c. 5 million, one person for every 10 square miles of land surface.
d. 1 million, five persons for every 1 square mile of land surface.
e. 1000 people, one person for every 10 square miles of land surface.

Answer

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