The Patient Presents to the Clinic for an Initial Prenatal

The patient presents to the clinic for an initial prenatal examination. She asks the nurse whether there might be a problem for her baby because she has type B Rh-positive blood and her husband has type O Rh-negative blood, or because her sister's baby had ABO incompatibility. What is the nurse's best answer?

A) "Your baby would be at risk for Rh problems if your husband were Rh-negative."
B) "Rh problems only occur when the mother is Rh-negative and the father is not."
C) "ABO incompatibility occurs only after the baby is born."
D) "We don't know for sure, but we can test for ABO incompatibility."
E) "Your husband's being type B puts you at risk for ABO incompatibility."