A Client's Identical Twin Has Been Diagnosed with Bipolar Disorder

A client's identical twin has been diagnosed with bipolar disorder.The client says,"I know this problem runs in families.What are the chances I will also develop it?" What is the nurse's best response?

A) "Your chance is the same as that of your nontwin siblings."
B) "Concordance figures put your risk at between 40% and 45%."
C) "Your risk is likely lower than that of your nontwin siblings."
D) "Genetics is not the only determining factor for the development of bipolar disorder."