What experience makes wind-wolf want to stop attending the school?

a. the teacher made fun of wind-wolf when he answered that there were 13 months in a year.
b. the teacher made fun of wind-wolf's name and refused to call him by that name.
c. a classmate's mother would not let wind-wolf play at her house because he was an american indian.
d. wind-wolf was forced to cut his long hair because all students are required to wear their hair short.