The application scope of ultrasonic technology in obstetrics are（） A: prenatal diagnosis of fetal malformations B: genetic ultrasound C: intrauterine management of high-risk pregnancy D: interventional ultrasound and intrauterine therapy

What is the next best step in management?() A: Recommend cesarean section<br/>for placental abruption remote from delivery B: Continue expectant<br/>management, bleeding is likely from the cervix C: Send a CBC, type and screen,<br/>Kleihauer–Betke test, and place a second IV D: Consent the patient for<br/>transfusion of packed red blood cells (PRBCs) E: Place fetal scalp electrode<br/>(FSE) and intrauterine pressure catheter (IUPC) to better monitor<br/>fetus and contractions