Annie doesn't agree with her boss, but she is reluctant to speak against the proposal, because she doesn't want to be seen as putting her boss on the spot at the staff meeting. Annie decides not to say anything. This is a sign of what symptom of groupthink?​

I believe the answer is: Rationalization

in psychology, rationalization refers To the process of self-explaining a certain controversial behaviour of us in order to enable us avoid feeling badly about it. People tend to do this if they are unwilling to cope with the fact that their action is wrong/unethical.