Which statement about influences on children’s health is true?



a.
Of the 5.9 million annual deaths of children under age 5 worldwide, about half occur in developing countries.

b.
Infectious disease is responsible for the vast majority of annual deaths of children under age 5 worldwide.

c.
Even in well-nourished children, ordinary childhood illnesses usually affect physical growth and cognitive development.

d.
Poor diet depresses the body’s immune system, making children far more susceptible to disease.