What is the most notable contributor to increases in life expectancy?
A) advances in health care
B) reduction in infant mortality
C) sanitation improvements
D) genetic variations

Question

Quizplus · Accepted Answer

Reduction in infant mortality has had the biggest impact on increases in life expectancy. This is because historically, high rates of infant mortality significantly lowered average life expectancy. With improved healthcare, sanitation, and other factors, infant mortality rates have decreased, resulting in an overall increase in life expectancy. While advances in healthcare, sanitation improvements, and genetic variations have all contributed to increases in life expectancy to some extent, reduction in infant mortality has had the largest impact.

What Is the Most Notable Contributor to Increases in Life