According to Hollander's (1958) work on idiosyncrasy credits, which individual would be most ...

According to Hollander's (1958) work on idiosyncrasy credits, which individual would be most effective in convincing a majority to change their opinion?
 
  a. A person who has just joined the group, because such a person has no history of antagonism with any of themajority group members
 b. A person who does not belong to the group at all, because such a person would be perceived as the mostobjective
 c. A person who has been in the group for quite a while, but consistently disagrees with the group
  d. A person who has been in the group for a long time, and usually goes along with the majority of the group