What is the author's main argument in "an indian father's plea"?
a. that even though wind-wolf comes from a different culture, the teacher should still treat him fairly and with respect
b. that he thinks the teacher should encourage wind-wolf to forget his american indian culture and act like the white man
c. that he believes wind-wolf is dangerous and unteachable and should be sent back home to his tribe
d. that wind-wolf is a troublemaker and bad student who should be constantly disciplined by the teacher