Factors exogenous to a country's current level of income are identified as being responsible for some 84% of the increase in life expectancy during the period. ... But neither country's mortality has been directly affected by its own income; the effect shows up as a shift in the curve.
1. expert
2. high-tech
3. remote
4. investigate
5. purpose
6. exciting
7. drives
8. knowledge
Hope this helps !! :)
D is the correct answer here.
! Is your answer. Its easy.