question: Q:A 19-year-old woman, gravida 1, para 0, at 21 weeks’ gestation comes to the physician for a follow-up prenatal visit. At her previous appointment, her serum α-fetoprotein concentration was elevated. She had smoked 1 pack of cigarettes daily for 3 years but quit at 6 weeks' gestation. Examination shows a uterus consistent in size with a 21-week gestation. Ultrasonography shows fetal viscera suspended freely into the amniotic cavity. Which of the following is the most likely diagnosis?? 
  {'A': 'Diaphragmatic hernia', 'B': 'Umbilical hernia', 'C': 'Vesicourachal diverticulum', 'D': 'Gastroschisis', 'E': 'Omphalocele'},