International Efforts to Improve Child Health Generally Focus on the First

International efforts to improve child health generally focus on the first 5 years of life because

A) it is much easier to eliminate causative factors in this age group than in others.
B) nearly 90 percent of deaths in children under age 15 occur during these years.
C) the chances of a child living to his or her fifth birthday have halved in the last 50 years.
D) there is a high level of funding available as a quarter of child deaths occur in developed countries.