Bridget and Katie Have Two Classes Together: Communication and Anatomy

Bridget and Katie have two classes together: Communication and Anatomy. In Anatomy, Katie is having a difficult time learning the pathogenic organisms. Since Bridget is doing "A" work in their Communication class, Katie assumes Bridget is also good in Anatomy. Therefore, she asks Bridget to help her with her Anatomy homework. Katie's assumption about Bridget is an example of

A) allness stereotyping.
B) referent power.
C) halo and horns stereotyping.
D) indexing.