While countries in stage 4 of the epidemiologic transition have low rates of maternal mortality, they face other challenges. Which of the following are two of those challenges?
A. high infant mortality rates
B. high cost of public assistance for health care
C. high dependency support ratios
D. high elderly support ratios
E. high cost of diffusing medical knowledge to stage 1 country
A. high infant mortality rates
C. high dependency support ratios