According to Family, Twin, and Adoption Studies, a Person Is

Multiple Choice

According to family, twin, and adoption studies, a person is at greatest risk for developing schizophrenia ________.

A) if he or she has an identical twin diagnosed with the disorder
B) if he or she has a nonidentical twin diagnosed with the disorder
C) if he or she has an adoptive parent diagnosed with the disorder
D) if he or she has a biological parent diagnosed with the disorder