Reggie Is Part of the Town Council

Reggie is part of the town council. They have all decided that it would be best to build a new road that would bypass the downtown. A woman comes to a town council meeting with scientific evidence that their road's planned route would destroy the remaining ecosystem for a flock of endangered birds. Reggie and the other town council members dismiss her evidence without even considering it. What factor related to groupthink are they mainly showing in this example?

A) overestimated morality
B) stereotyped views of out-groups
C) closed-mindedness
D) self-censorship to create the illusion of unanimity