Exemplar basically means a typical example, or model, of a concept or role. However the meaning can be extended to mean he best example of a concept or role. For instance, someone might say that you are an exemplar student, which can mean that you are a great example, or model, of a student.
É só ler com atenção, e, se você leu o livro, vai saber de cara, boa sorte mano :)
I’m guessing B.
Good luck :)
Sort of it depends on your point of view of the story