Which of the Following Best Describes In-Group - Out-Group Dynamics

Multiple Choice

Which of the following best describes in-group - out-group dynamics?

A) In-group members identify with the personal struggles of out-group members.
B) Ingroups are "good"; outgroups are "bad".
C) The presence of an out-group can unify an in-group even when the in-group members are very different from one another.
D) Because they hate each other, members of an in-group and out-group usually know a lot about one another.