How did Clotfelter manage to solve the problem in the end?A.By seeking cooperation with he
How did Clotfelter manage to solve the problem in the end?
A.By seeking cooperation with heads of the school clubs and sports teams.
B.By hiring some graduate students to carry out a poll in the schools.
C.By cataloging the races from the pictures presented in the yearbooks.
D.By getting the racial data from the National Center for Education Statistics.