biology highschool

which of the following statements  about the events that occur during childbirth is correct?
a) an increase in prolactin causes the pelvic ligaments to relax
b) a decrease in estrogen causes contraction of the abdominal muscles
c) a increase in oxylocin causes contraction of the uterine muscles
d) a decrease in progesterone causes relaxation of placental membranes

An infant born to a mother with drug addiction may also be born addicted because
a) placental membranes promote the mixing of maternal blood with fetal blood
b) a child can inherit some of its mothers addictions
c) a child can acquire some of its mothers habits
d) placental membranes promote the diffusion of maternal blood contents into fetal blood contents