Which of the Following Was a Reason Given in the Text

Which of the following was a reason given in the text for the change in infant mortality rates between 1941 and 2008?

A) Declining breastfeeding practices in favour of formula and dietary supplements.
B) Outbreaks of resistant childhood diseases such as diphtheria and scarlet fever as medical research support went toward increased military spending.
C) Better prenatal care as awareness about its importance increased.
D) Advances in pediatrics that led to new procedures for treating distressed and premature deliveries.