The potential for hemolytic disease of the newborn occurs when
A)maternal Rh+ cells enter an Rh− fetus. B)fetal Rh+ cells enter an Rh− mother. C)maternal Rh− cells enter an Rh+ fetus. D)fetal Rh− cells enter an Rh+ mother. E)fetal Rh+ cells enter an Rh+ mother.