【单选题】

According to the passage, all of the following factors have been associated as either a cause or effect of the emergence of segregated black neighborhoods EXCEPT
A．(A) The failure of the educational system to help improve blacks' economic status

B．(B) Political apathy on the of the authorities to solve the problem of segregation
C．(C) A preference on the part of blacks concerning where they choose to live
D．(D) Rising rate of unemployment among the black community
E．(E) Racial conflict between the black community and other communities