For most of human history, up to the modern era, life expectancy was probably about ______ years.
A) 20-30
B) 30-40
C) 40-50
D) 50-60

Name: For most of human history, up to the modern era, life expectancy was probably about ______ years. A) 20-30 B) 30-40 C) 40-50 D) 50-60
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For most of human history, life expectancy was around 20-30 years due to high infant mortality rates, lack of medical knowledge, and harsh living conditions.

For Most of Human History, Up to the Modern Era