Which of the following would not be effective in minimizing groupthink?

a. Caroline wants her team to openly vote by a show of hands either for or against her business plan.

b. Karen openly invites input from all team members and even those outside her team.

c. Annina reminds her team that everyone will be held responsible for the ultimate decision of her group.

d. Juanita works hard to remain impartial to all ideas, no matter what they are.