Biological Research Concerning the Development of Mood Disorders Suggests That

Biological research concerning the development of mood disorders suggests that:

A) part of the problem of depression is the underproduction of cortisol.
B) there is less activity in the right frontal lobes of depressed individuals.
C) individuals with major depression have less activity in the left prefrontal cortex than non-depressed individuals.
D) many chronically depressed people have shrinkage of the hippocampus and amygdala.