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.