Which Statement Is Evidence Suggesting That Depression Is NOT the Result

Which statement is evidence suggesting that depression is NOT the result of a novel reaction of the nervous system to the modern environment?

A) The fundamental aspects of the modern environment differ significantly from prehistoric environments.
B) Depression is more prevalent among females compared with males.
C) Depression is seen in a variety of animals whose environments have not changed drastically in recent times.
D) The nervous system continues to adapt to the changing environment.