A Pregnant Woman Mentions That 2 Years Ago, Her First

A pregnant woman mentions that 2 years ago, her first child died 2 weeks after birth because the newborn's "lungs were immature" at birth.Because you are planning a cesarean section, you want to determine first whether there is a risk of respiratory problems for her current baby.Which of the following results from an analysis of the mother's amniotic fluid would indicate a high risk?

A) A low ratio of free cholesterol/cholesterol esters.
B) An elevated glucose level.
C) A low lecithin/sphingomyelin ratio.
D) An elevated level of phosphatidylglycerol.
E) A reduced level of platelet-activating factor.