Review Question - QID 109896

A 31-year-old G3P2 woman gives birth to a newborn male at 38 weeks’ gestation. Upon initial examination, the child’s body and extremities are pink, his pulse is 110/min, and his arms and legs resist extension. He cries spontaneously with a weak, irregular, gasping cry. The pregnancy was complicated by polyhydramnios. The mother’s past medical history is notable for non-insulin-dependent diabetes mellitus. The baby has a distended abdomen and vomits bilious fluid within an hour of birth. An abdominal radiograph is performed and shown in Figure A. This patient’s condition is caused by which of the following?