Which of the Following Statements About the Hawthorne Studies Is

Which of the following statements about the Hawthorne Studies is incorrect?

A) The studies were started to identify the influence that "social factors" had on productivity.
B) The studies were started to determine the effect that different levels of lighting had on productivity.
C) In one study,workers' productivity increased as the level of illumination at their workstations was decreased.
D) The "social setting" of the various experiments influenced the results of the studies.
E) People would restrict output to avoid the displeasure of the group,even if it meant sacrificing pay.