Why Did Many Northerners Lose Interest in Fighting for Equal

Why did many northerners lose interest in fighting for equal rights for blacks by the 1870s?

A) They believed that blacks already had achieved equal rights in much of the country.
B) They felt that their support was only hurting and not helping blacks gain rights.
C) They were intimidated by blacks in the South and did not want to encourage rebellion.
D) They felt that southern whites should be active in the cause instead.
E) They had grown tired of the issue, and many believed in white superiority.