Answer:
in group bias
Explanation:
In-group bias: In social psychology, the term in-group bias is also referred to as in-group favoritism, in-group preference, in-group–out-group bias, and intergroup bias.
In-group bias is defined as a phenomenon in which an individual displays a particular pattern of supporting different members of his or her in-group as compared to the out-group people or members. It can be displayed in terms of the evaluation of one person who belongs to a specific group by a member of the other group.
In the question above, the girls' beliefs best illustrates in group-bias.
