At the First Prenatal Visit, a Primiparous Patient with Type

At the first prenatal visit, a primiparous patient with type O negative blood has a negative indirect antiglobulin (IAT) Coombs' test.Which response by the nurse is most accurate when the patient asks what this result means?

A) "A negative result means that you already are sensitized and you should not receive Rh immune globulin vaccine."
B) "Your blood cells at this point do not react to antibodies that could cause problems for your baby, but you will need follow-up antibody testing in your last trimester."
C) "The Coombs' indirect test can identify if your baby has the same blood type as you do.If not, your health-care provider will order more tests to determine if you need a transfusion before delivery."
D) "This is a routine test screening for antibodies that may cause problems in the newborn, but since you are a universal donor with type O blood, it has no significance for you."