An O-Positive Mother Gave Birth to an A- Negative Baby

An O-positive mother gave birth to an A- negative baby. After 24 hours the newborn's bilirubin level rose to 18 mg/dL. A DAT performed on the cord blood specimen was positive with polyspecific AHG and anti-IgG reagents. It is probable that from maternal circulation is coating the newborn's red blood cells.

A) anti-A, B
B) anti-B
C) anti-A
D) anti-D