The Parents of a Newborn Girl Express Concern About the Infant's

The parents of a newborn girl express concern about the infant's vaginal discharge,which appears to be bloody mucus.The nurse explains that this is caused by:

A) premature stimulation of the ovarian hormones by the pituitary system.
B) cessation of female sex hormones transferred in utero from mother to infant.
C) the increased amount of circulating blood from the mother throughout pregnancy.
D) trauma to the genitalia during the birth process.