What Is One Cause of a Change in Rates of Low

What is one cause of a change in rates of low birth-weight babies in the past 20 years?

A) Improved prenatal care has caused an increase in low birth weight babies by increasing the odds that a child with a condition that may cause low birth weight will survive pregnancy.
B) An increase in the use of assisted reproductive technology that has resulted in more multiple births.
C) Improved prenatal care has caused a decrease in low birth weight babies by improving maternal health.
D) An increase in the use of assisted reproductive technology that has resulted in fewer multiple births.