A 2-day-old infant is brought to your office by his mother, who says she has been noticing copius amounts of blood in his stool for the past 2 days. The patient is tachycardic but has not been experiencing any pain. What embyronic structure is likely to be responsible for this patient's condition?
a. Ductus Arteriosus
b. Ductus Venosus
c. Umbillical Artery
d. Urachus
e. Vitelline Duct