Genome-Wide Analyses Have Found That

Genome-wide analyses have found that:

A) Schizophrenia, bipolar disorder, major depressive disorder, autism spectrum disorder, and attention deficit hyperactivity disorder may all stem from several specific genetic variations.
B) Schizophrenia stems from a specific genetic variation that is different from the one responsible for bipolar disorder, major depressive disorder, autism spectrum disorder, and attention deficit hyperactivity disorder.
C) Schizophrenia, bipolar disorder, major depressive disorder, autism spectrum disorder, and attention deficit hyperactivity disorder may all stem from unique genetic variations
D) There is no genetic support for single genetic variations contributing to multiple disorders.