Most Psychologists Agree That Over the Last 50 Years, IQ

Most psychologists agree that over the last 50 years, IQ scores have

A) increased, particularly in Western, industrialized nations.
B) decreased, particularly in Western, industrialized nations.
C) remained the same in Westernized nations, but have dramatically increased in the underdeveloped ones.
D) increased only in Asian countries, not in Europe or the U.S.and Canada.