A 48-Year-Old Woman Reports That Her 50-Year-Old Brother Has Severe

A 48-year-old woman reports that her 50-year-old brother has severe bipolar disorder, and she is concerned that her two teenage daughters may be predisposed to theproblem. She has no manic or depressive symptoms. How should you respond to her concerns?

A) "If your household is stable and loving, your daughter's increased risk can be minimized."
B) "If your husband also has no symptoms of the disorder, your daughters have the same risk as the general population."
C) "Because the heritability of bipolar disorder is 50%, it is likely that only one of your two daughters will develop the disorder."
D) "Because your brother is a blood relative, your daughters have a risk for bipolar disorder that is two to three times greater compared with the general population."