Which of the following events had a major influence on the history of social psychology?

A) the economic crisis of the 1970s
B) World War II
C) the Cold War
D) the development of institutional care for people with severe personality disorders

World War II

A global military conflict that took place between 1939 and 1945, involving most of the world's nations and marked by significant events and severe human and economic losses.

Economic Crisis

A situation in which a country's economy experiences a sudden downturn brought on by a financial panic or an external shock, leading to a severe drop in consumer wealth and confidence and financial instability.

Cold War

The period of political and military tension after World War II between powers in the Western Bloc (led by the United States) and powers in the Eastern Bloc (led by the Soviet Union) that never escalated into direct major warfare.