A Group O,D-Positive Mother Gave Birth to a Group A,D-Negative

A group O,D-positive mother gave birth to a group A,D-negative infant.After 24 hours,the newborn's bilirubin level rose to 19 mg/dL.A direct antiglobulin test performed on the cord blood specimen was positive with anti-IgG.What antibody is most likely implicated?

A) Anti-D
B) Anti-A
C) Anti-B
D) Anti-A,B