Paulette recently irritated some of the girls in a sorority at her college, so they have decided to exclude her from their group. the group of girls ignores paulette-- shuns her-- and communicates that she is not welcome at their events. the group of sorority sisters is using to communicate their displeasure with paulette.

The correct answer is ostracism.

Ostracism or to ostracize someone means to purposely exclude or banish someone from a group. Individuals who are ostracized experience feelings of rejection, humiliation and often feel lonely and depressed. Ostracism can be found in various social settings and groups, but tends to be more common in adolescent age groups.  

Ais the correct answer