The Medication Known as Mifepristone,or RU-486,acts by

The medication known as mifepristone,or RU-486,acts by

A) killing sperm as they enter the female reproductive tract.
B) blocking the progesterone receptors of cells in the uterine lining and causes the loss of an implanted embryo.
C) preventing an egg from maturing and being released-essentially a stronger regular birth control pill.
D) destroying the embryo which in turn causes a spontaneous miscarriage.
E) preventing development of a uterine lining.