His aunts and grandmothers taught him to count while they sorted out the materials used to make the abstract
designs in the native baskets. He learned his basic
numbers by helping his father count and sort the rocks to
be used in the sweat-lodge - seven rocks for a medicine
sweat, say, or thirteen for the summer solstice ceremony.
And he was taught mathematics by counting the sticks we
use in our traditional native hand game.
-- Medicine Grizzlybear Lake, "An Indian Father's Plea"
Why does the author use this example of his son's tribal education in his
letter to the teacher?
A. To show that his son is smart but has just learned things in a
different way
B. To show that his son is slow and that the teacher made the
correct assessment
O C. To show that his son is good at crafts and should be more
creative
D. To show that his son is an American Indian and should be treated
differently