36 weeks of pregnancy, blood pressure 180/120mmHg, severe abdominal pain, pale complexion, weak pulse, blood pressure dropped to 100/70mmHg, a small amount of vaginal bleeding, uterus larger than the pregnancy month, hard as a plate, inaudible fetal heart, should be considered as
选项：

A:placenta previa;
B:threatened uterine rupture;
C:severe placental abruption;
D:threatened Prematurity;
E:amniotic fluid embolism