In Underdeveloped and Developing Countries, What Is the Current Status

In underdeveloped and developing countries, what is the current status of mortality rates from heart disease and stroke, and why?​

A) ​They are rising because of the lack of medical treatment in these countries.
B) ​They are rising as lifestyles become more like those of developed countries.
C) ​They are stable as better lifestyles and less healthcare cancel out each other.
D) ​They are falling as these countries are acquiring better medical technologies.