Which  of the following statements about the  informal organisation  is  NOT true?
AThe influence of the informal organisation was highlighted  by the  Hawthorne Studies
B  in the way group  norms and dynamics affected  productivity.[|]Managers in  positions of authority generally cannot be part of the  informal organisation.[|]Informal  organisation can  pose a threat to employee  health and safety.[|]Informal  organisation can stimulate  innovation.