Segregation Has Been Harder to Overcome in the North Than

Segregation has been harder to overcome in the North than in the South because _______.

A) segregation in the North is de facto segregation
B) segregation in the North is de jure segregation
C) northerners opposed segregation more strenuously than southerners
D) northerners are politically more powerful than southerners
E) blacks were reluctant to challenge their northern allies in the civil rights struggle