The Years After 1960 Witnessed Some Social and Economic Changes

The years after 1960 witnessed some social and economic changes of extraordinary magnitude,including all of the following except

A) The core of U.S. growth shifted away from its historic base in heavy industry.
B) A huge influx of women into the labor force occurred.
C) Legislation provided for greater safety on the job and cleaner air and water.
D) The Cold War ended in the early 1970s, following the end of the Vietnam War, and defense spending declined significantly from the Cold War years of the 1950s.