The history of disease before the 1900s suggests that

A. cities are healthier places to live than rural areas.
B. long-distance travel increases public health by exposing doctors to new scientific ideas.
C. changes in medical technology play a large role in increasing average life expectancy.
D. changes in the knowledge base of folk healers play a large role in increasing average life expectancy.
E. changes in women’s roles can play a large role in increasing average life expectancy.


Answer: E

Sociology

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