The Original Intent of the Managers at the Hawthorne Plant

The original intent of the managers at the Hawthorne plant was to see if they could make their factory workers more productive by changing light levels in the factory.To do this, they increased the lighting for one group of workers in a special test room and kept the lights the same in the control room.They found that

A) workers in the special test room came to outperform workers in the control room.
B) workers in the control room actually and unexpectedly outperformed workers in the special test room.
C) neither group of workers showed an increase in productivity.
D) both groups of workers showed an increase in productivity.