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).
Push it away and say NO to vaping. Vaping is bad for you and your body. Try to help your friend stop vaping. Search up the consequences of vaping. Maybe you can help vape-addicted people end vaping!