Which One of the Following Conclusions Was Drawn by the Experimenters

Which one of the following conclusions was drawn by the experimenters from the bank wiring observation room experiment?

A) The subjects did not find working in the test room enjoyable.
B) Human factors within organizations could significantly influence production.
C) Members of the work group pressured one another to work harder so that each group member would receive more pay.
D) Improved working conditions resulted in increased production.
E) Social groups in organizations could effectively exert pressure to influence individuals to disregard monetary incentives.