Final answer:
The blood relationship of concern is when the mother has a different blood type from the baby, and there is a positive Rh factor in the baby's blood.
Step-by-step explanation:
The mother-baby blood relationship of concern is option D, where the mom is AB(-) and the baby is B(+). In this case, the mother has a different blood type (AB) than the baby (B), and there is a positive Rh factor (+) in the baby's blood. This combination can lead to potential complications, particularly if the mother's immune system develops antibodies against the Rh factor in the baby's blood.
Learn more about Blood relationships in biology