Which sentence in the excerpt best shows the lack of interest of white americans in the lives of african americans and other minorities?

a: publishing houses and theatrical promoters are in business to make money.
b: they shy away from romantic stories about negroes and jews because they feel that they know the public indifference to such works, unless the story or play involves racial tension.
c: it can then be offered as a study in sociology, with the romantic side subdued
d: sympathetic as they might be, they cannot afford to be crusaders.