The nurse is reinforcing teaching with a client who has a new prescription for Rh immunoglobulin. The client has an Rh-negative blood type and gave birth 24 hours ago to a newborn who has an Rh-positive blood type. Which of the following statements by the client would indicate a correct understanding of the teaching?

A I need the medication now because the dose I received during pregnancy was ineffective B I can receive the medication at my follow-up appointment in 6 weeks C I need to have a blood specimen obtained in 3 months to verify that the medication was effective D I will receive the medication to prevent my body from forming antibodies