Which statement best explains why the period from the end of reconstruction to the early 20th century was referred to as the nadir of american race relations? state governments actively resisted the efforts of the federal government to promote an integrated society. both african americans and whites moved to segregated communities to avoid intermingling with members of the other race. racism was deeply felt throughout the nation, and the civil rights gains of the reconstruction period were rolled back by jim crow laws. racially motivated violence tore apart communities around the nation and resulted in inner-city riots that devastated african american neighborhoods.