Which of these characters are typical of a fetus with trisomy 21?
A. Flat nasal profile, duodenal atresia, mild ventriculomegaly, and echogenic bowel
B. Cystic hygroma, webbed neck, and infantile sexual characteristics
C. Flat nasal profile, duodenal atresia, and echogenic bowel
D. Cystic hygroma, flat nasal profile, and webbed neck
E. Short stature, infantile sexual characteristics, and ventriculomegaly
