Devil's advocacy in the mechanism in which a person from the group is chosen to act as a critic who states his view-point on decision that has been made .In this process, quality of the decision is improved as group-think mechanism is degraded.
Other options are incorrect because dialectical inquiry,group-think,delphi and dyadic communications are not the manner in which a person of community is permitted to act as the critic for the decision.Thus, the correct option is option(b).
In the 1870s, unions began to investigate facory conditions. Union workers together with journalists uncovered how bad the conditions actually are. We today know that the conditions at the time were abnormal considered from today's standpoint.
