Which Finding Would MOST STRONGLY Support the Assumption That Learned

Which finding would MOST STRONGLY support the assumption that learned helplessness is a potential cause of depression?

A) evidence from archival records showing increases in the incidence of depression following natural disasters
B) evidence from a survey showing that most depressed people report prior exposure to uncontrollable negative events
C) evidence from an experiment showing that when people are exposed to uncontrollable negative events,depressive symptoms follow
D) evidence from a clinical interview in which a client reports being exposed to uncontrollable negative events prior to seeking therapy