In the Hawthorne Studies, Employees Were Involved in the Planning

In the Hawthorne studies, employees were involved in the planning of the experiments. What did this cause employees to do?

A) set rather simple, easily attainable goals
B) become distracted and thus reduced productivity
C) believe that management respected their ideas, which motivated them
D) have high levels of productivity, but show disrespect for the managers in their test area