Geography, 11.10.2020 15:01, tynitenaire
What has been the most significant cause of the decline in death rate in less developed countries?
A. The discovery and dissemination of the smallpox vaccine
B. The beginning of scientific medicine and formal medical collage
C. The transfer of disease prevention methods to less developed countries
D. The development of methods of containing disease- carrying bacteria
E. The beginning of the single-payer health care system in Western Europe
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