Between 1950 and 1970, suburbanization: a) eased racial tensions in American cities. b) encouraged a revitalization of American cities. c) hardened racial divisions in American life. d) encouraged Puerto Rican immigration. e) was the theme of the Broadway musical West Side Story.

i think E) Was the Broadway musical west side story.

C.  At this time, urban segregations and big problems of racism take place

Explanation:

i would say that the politicial parties from state to state varies.

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.