The Nurse Is Participating in a Study Focusing on the Genetics

The nurse is participating in a study focusing on the genetics of depressive disorders.One of the intake questions the nurse asks volunteers is "Does anyone in your family have a major depressive disorder?" What is the best rationale for this question?

A) Firsthand knowledge of the symptoms and behaviors may influence a subject's answers.
B) Subjects with a family history of major depressive disorder are not eligible for genetic studies.
C) Having a family member with major depressive disorder increases the subject's risk of developing the disorder.
D) This is one of many standard questions asked in all psychological study intake forms.