He is not culturally "disadvantaged," but he is culturally "different." If you ask him how many months there are in a
year, he will probably tell you thirteen. He will respond this
way not because he doesn't know how to count properly,
but because he has been taught by our traditional people
that there are thirteen full moons in a year according to the
native tribal calendar and that there are really thirteen
planets in our solar system and thirteen tail feathers on a
perfectly balanced eagle.
Which of the following best explains why the author refers to the traditional
people" in this paragraph?

A. To appeal to the reader's emotions

B. To make a logical claim

C. To show that the reader is biased

O D. To establish credibility with the reader