For most of human history, the average life expectancy at birth was:
A) less than 20 years
B) between 20 and 30 years
C) between 30 and 40 years
D) more than 40 years but less than it is today

Name: For most of human history, the average life expectancy at birth was: A) less than 20 years B) between 20 and 30 years C) between 30 and 40 years D) more than 40 years but less than it is today
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For most of human history, the average life expectancy at birth was less than 20 years.

For Most of Human History, the Average Life Expectancy at Birth