the correct answer would be B.
Answer:
A high school
Explanation:
An in-group represents a group of people who psychologically believe that they are part of that group. These groups espouse some ideology that makes members feel psychologically attached to the point of forming a group. A high school is not an in-group because people who are attending high school are not there because they feel psychologically attached to something related to high school but rather because it is their duty to attend this place.