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 Lake use this example of Wind-Wolf's education within the tribe in "An Indian Father's Plea"?
A. To prove to the teacher that Wind-Wolf is not a slow learner but has just learned things differently
B. To explain that his son is not intelligent enough to continue to attend the white man's school
C. To appeal to any prejudices the teacher has about American Indians and their culture
D. To make the teacher feel bad about Wind-Wolf's lack of formal education and try harder