Given the Status of Genetics Research on Depressive and Bipolar

Multiple Choice

Given the status of genetics research on depressive and bipolar disorders, we can conclude that

A) no one gene likely leads directly to depressive or bipolar disorders.
B) no one set of genes leads directly to depressive or bipolar disorders.
C) genetics may produce brain, neurochemical, hormonal, or other changes that lead to a depressive or bipolar disorders.
D) all of these statements are correct.