Answer:
Sub typing
Step-by-step explanation:
Sub typing is part of stereotyping. Sub typing is a process in which a perceive gives the response to the target group who disqualifies them stereotypes.
They seem to the exceptional and rules and to place them in a different category that confirmed the stereotypes. Sub typing is a process of the stereotype that leads to the perseveration.
Thus here when Beth gets to know about Kim, he said that she is is the exception to the rule which is the example of the sub typing in stereotyping.