Many Children with Down Syndrome Have an Associated Atrioventricular Canal

Many children with Down syndrome have an associated atrioventricular canal malformation that involves

A) aortic stenosis, ventricular aneurysm, and atrioventricular block.
B) atrial hypoplasia, ventricular hypertrophy, and anomalous aortic valve.
C) atrial septal defect, ventricular septal defect, and a common atrioventricular valve.
D) coarctation of the aorta, ventricular hypoplasia, and patent ductus arteriosus.