Family Studies Are Often Used to Help Determine Whether a Psychological

Family studies are often used to help determine whether a psychological disorder has a genetic component. Which of the following patterns is typical for a disorder that is influenced by genetics?

A) Siblings of the person with the disorder are more likely to have the disorder than cousins, and cousins are just as likely to have the disorder as the general public.
B) Siblings of the person with the disorder will almost always have the same or similar disorders, and cousins are more likely than the general public to have disorders.
C) Siblings of the person with the disorder are more likely than cousins to have the disorder, and cousins are more likely to have the disorder than the general public.
D) Siblings will almost always have the same or similar disorders, though cousins may have a similar rate of the disorder as the general public.