Depression and Suicide Are More Common in Today's North American

Multiple Choice

Depression and suicide are more common in today's North American culture than they were in the very different North American culture of nearly a century ago.But in both the past and the more recent cultural settings,pessimistic thinking and feelings of loneliness corresponded to a heightened risk of depression and suicide.This best illustrates that ________ often underlie cultural differences in behavior.

A) genetic differences
B) unconscious motives
C) early childhood memories
D) common psychological processes