Which of These Occurred During the Time Period Between the 1960s

Which of these occurred during the time period between the 1960s and the mid-1980s?

A) The first I/O PhD was awarded to Bruce V. Moore.
B) The Army Alpha and Army Beta intelligence tests were administered for the first time.
C) The Hawthorne studies were conducted.
D) The civil rights movement led to a greater focus on fairness and discrimination issues.